chibenwa commented on a change in pull request #385:
URL: https://github.com/apache/james-project/pull/385#discussion_r617439472



##########
File path: 
server/protocols/jmap-rfc-8621-integration-tests/jmap-rfc-8621-integration-tests-common/src/main/scala/org/apache/james/jmap/rfc8621/contract/MDNSendMethodContract.scala
##########
@@ -0,0 +1,1948 @@
+/****************************************************************
+ * Licensed to the Apache Software Foundation (ASF) under one   *
+ * or more contributor license agreements.  See the NOTICE file *
+ * distributed with this work for additional information        *
+ * regarding copyright ownership.  The ASF licenses this file   *
+ * to you under the Apache License, Version 2.0 (the            *
+ * "License"); you may not use this file except in compliance   *
+ * with the License.  You may obtain a copy of the License at   *
+ *                                                              *
+ *  http://www.apache.org/licenses/LICENSE-2.0                  *
+ *                                                              *
+ * Unless required by applicable law or agreed to in writing,   *
+ * software distributed under the License is distributed on an  *
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
+ * KIND, either express or implied.  See the License for the    *
+ * specific language governing permissions and limitations      *
+ * under the License.                                           *
+ ****************************************************************/
+
+package org.apache.james.jmap.rfc8621.contract
+
+import io.netty.handler.codec.http.HttpHeaderNames.ACCEPT
+import io.restassured.RestAssured._
+import io.restassured.builder.ResponseSpecBuilder
+import io.restassured.http.ContentType.JSON
+import net.javacrumbs.jsonunit.assertj.JsonAssertions.assertThatJson
+import org.apache.http.HttpStatus.SC_OK
+import org.apache.james.GuiceJamesServer
+import org.apache.james.core.Username
+import org.apache.james.jmap.core.ResponseObject.SESSION_STATE
+import org.apache.james.jmap.draft.MessageIdProbe
+import org.apache.james.jmap.http.UserCredential
+import org.apache.james.jmap.rfc8621.contract.Fixture.{BOB, BOB_PASSWORD, 
DOMAIN, authScheme, baseRequestSpecBuilder, _}
+import 
org.apache.james.jmap.rfc8621.contract.MDNSendMethodContract.TAG_MDN_MESSAGE_FORMAT
+import org.apache.james.mailbox.MessageManager.AppendCommand
+import org.apache.james.mailbox.model.{MailboxId, MailboxPath, MessageId, 
MultimailboxesSearchQuery, SearchQuery}
+import org.apache.james.mime4j.codec.DecodeMonitor
+import org.apache.james.mime4j.dom.{Message, Multipart}
+import org.apache.james.mime4j.message.DefaultMessageBuilder
+import org.apache.james.mime4j.stream.{MimeConfig, RawField}
+import org.apache.james.modules.MailboxProbeImpl
+import org.apache.james.utils.DataProbeImpl
+import org.awaitility.Awaitility
+import org.awaitility.Durations.ONE_HUNDRED_MILLISECONDS
+import org.awaitility.core.ConditionFactory
+import org.junit.jupiter.api.{BeforeEach, Tag, Test}
+
+import java.nio.charset.StandardCharsets
+import java.time.Duration
+import java.util.concurrent.TimeUnit
+import scala.jdk.CollectionConverters._
+
+object MDNSendMethodContract {
+  val TAG_MDN_MESSAGE_FORMAT: "MDN_MESSAGE_FORMAT" = "MDN_MESSAGE_FORMAT"
+}
+
+trait MDNSendMethodContract {
+  private lazy val slowPacedPollInterval: Duration = ONE_HUNDRED_MILLISECONDS
+
+  private lazy val calmlyAwait: ConditionFactory = Awaitility.`with`
+    .pollInterval(slowPacedPollInterval)
+    .and.`with`.pollDelay(slowPacedPollInterval)
+    .await
+
+  private lazy val awaitAtMostTenSeconds: ConditionFactory = 
calmlyAwait.atMost(10, TimeUnit.SECONDS)
+
+  private def getFirstMessageInMailBox(guiceJamesServer: GuiceJamesServer, 
username: Username): Option[Message] = {
+    val searchByRFC822MessageId: MultimailboxesSearchQuery = 
MultimailboxesSearchQuery.from(SearchQuery.of(SearchQuery.all())).build
+    val defaultMessageBuilder: DefaultMessageBuilder = new 
DefaultMessageBuilder
+    defaultMessageBuilder.setMimeEntityConfig(MimeConfig.PERMISSIVE)
+    defaultMessageBuilder.setDecodeMonitor(DecodeMonitor.SILENT)
+
+    
guiceJamesServer.getProbe(classOf[MailboxProbeImpl]).searchMessage(searchByRFC822MessageId,
 username.asString(), 100)
+      .asScala.headOption
+      .flatMap(messageId => 
guiceJamesServer.getProbe(classOf[MessageIdProbe]).getMessages(messageId, 
username).asScala.headOption)
+      .map(messageResult => 
defaultMessageBuilder.parseMessage(messageResult.getFullContent.getInputStream))
+  }
+
+  private def buildOriginalMessage(tag : String) :Message =
+    Message.Builder
+      .of
+      .setSubject(s"Subject of original message$tag")
+      .setSender(BOB.asString)
+      .setFrom(BOB.asString)
+      .setTo(ANDRE.asString)
+      .addField(new RawField("Disposition-Notification-To", s"Bob 
<${BOB.asString()}>"))
+      .setBody(s"Body of mail$tag, that mdn related", StandardCharsets.UTF_8)
+      .build
+
+  def randomMessageId: MessageId
+
+  @BeforeEach
+  def setUp(server: GuiceJamesServer): Unit = {
+    server.getProbe(classOf[DataProbeImpl])
+      .fluent()
+      .addDomain(DOMAIN.asString())
+      .addUser(BOB.asString(), BOB_PASSWORD)
+      .addUser(ANDRE.asString, ANDRE_PASSWORD)
+      .addUser(DAVID.asString, DAVID.asString())
+
+    requestSpecification = baseRequestSpecBuilder(server)
+      .setAuth(authScheme(UserCredential(BOB, BOB_PASSWORD)))
+      .build()
+  }
+
+  @Test
+  def mdnSendShouldBeSuccessAndSendMailSuccessfully(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+
+    val bobMailBoxPath: MailboxPath = MailboxPath.inbox(BOB)
+    val bobInboxId: MailboxId = mailboxProbe.createMailbox(bobMailBoxPath)
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+
+    val mdnSendRequest: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "subject": "Read receipt for: World domination",
+         |            "textBody": "This receipt shows that the email has been 
displayed on your recipient's computer. ",
+         |            "reportingUA": "joes-pc.cs.example.com; Foomail 97.1",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            },
+         |            "extensionFields": {
+         |              "X-EXTENSION-EXAMPLE": "example.com"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/$$mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+   val mdnSendResponse: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(mdnSendRequest)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(mdnSendResponse)
+      .whenIgnoringPaths("methodResponses[1][1].newState",
+        "methodResponses[1][1].oldState")
+      .isEqualTo(
+        s"""{
+           |    "sessionState": "${SESSION_STATE.value}",
+           |    "methodResponses": [
+           |        [
+           |            "MDN/send",
+           |            {
+           |                "accountId": "$ANDRE_ACCOUNT_ID",
+           |                "sent": {
+           |                    "k1546": {
+           |                        "finalRecipient": "rfc822; 
${ANDRE.asString}",
+           |                        "includeOriginalMessage": false,
+           |                        "originalRecipient": "rfc822; 
${ANDRE.asString()}"
+           |                    }
+           |                }
+           |            },
+           |            "c1"
+           |        ],
+           |        [
+           |            "Email/set",
+           |            {
+           |                "accountId": "$ANDRE_ACCOUNT_ID",
+           |                "oldState": "23",
+           |                "newState": "42",
+           |                "updated": {
+           |                    "${relatedEmailId.serialize()}": null
+           |                }
+           |            },
+           |            "c1"
+           |        ]
+           |    ]
+           |}""".stripMargin)
+
+    val requestQueryMDNMessage: String =
+      s"""{
+         |  "using": ["urn:ietf:params:jmap:core","urn:ietf:params:jmap:mail"],
+         |  "methodCalls": [[
+         |    "Email/query",
+         |    {
+         |      "accountId": "$ACCOUNT_ID",
+         |      "filter": {"inMailbox": "${bobInboxId.serialize}"}
+         |    },
+         |    "c1"]]
+         |}""".stripMargin
+
+    awaitAtMostTenSeconds.untilAsserted { () =>
+      val response: String =
+        `given`(
+          baseRequestSpecBuilder(guiceJamesServer)
+            .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+            .setBody(requestQueryMDNMessage)
+            .build, new ResponseSpecBuilder().build)
+          .post
+        .`then`
+          .statusCode(SC_OK)
+          .contentType(JSON)
+          .extract
+          .body
+          .asString
+
+      assertThatJson(response)
+        .inPath("methodResponses[0][1].ids")
+        .isArray
+        .hasSize(1)
+    }
+  }
+
+  @Test
+  def mdnSendShouldBeSuccessWhenRequestAssignFinalRecipient(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+    
guiceJamesServer.getProbe(classOf[DataProbeImpl]).addUserAliasMapping("david", 
"domain.tld", "[email protected]")
+
+    val bobMailBoxPath: MailboxPath = MailboxPath.inbox(BOB)
+    mailboxProbe.createMailbox(bobMailBoxPath)
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+
+    val mdnSendRequest: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "$DAVID_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "subject": "Read receipt for: World domination",
+         |            "textBody": "This receipt shows that the email has been 
displayed on your recipient's computer. ",
+         |            "finalRecipient": "rfc822; ${DAVID.asString()}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/$$mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val mdnSendResponse: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(mdnSendRequest)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(mdnSendResponse)
+      .whenIgnoringPaths("methodResponses[1][1].newState",
+        "methodResponses[1][1].oldState")
+      .isEqualTo(
+        s"""{
+           |    "sessionState": "${SESSION_STATE.value}",
+           |    "methodResponses": [
+           |        [
+           |            "MDN/send",
+           |            {
+           |                "accountId": "$ANDRE_ACCOUNT_ID",
+           |                "sent": {
+           |                    "k1546": {
+           |                        "includeOriginalMessage": false,
+           |                        "originalRecipient": "rfc822; 
${ANDRE.asString()}"
+           |                    }
+           |                }
+           |            },
+           |            "c1"
+           |        ],
+           |        [
+           |            "Email/set",
+           |            {
+           |                "accountId": "$ANDRE_ACCOUNT_ID",
+           |                "oldState": "23",
+           |                "newState": "42",
+           |                "updated": {
+           |                    "${relatedEmailId.serialize()}": null
+           |                }
+           |            },
+           |            "c1"
+           |        ]
+           |    ]
+           |}""".stripMargin)
+  }
+
+  @Test
+  def mdnSendShouldBeFailWhenDispositionPropertyIsInvalid(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+
+    val bobMailBoxPath: MailboxPath = MailboxPath.inbox(BOB)
+    mailboxProbe.createMailbox(bobMailBoxPath)
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+
+    val mdnSendRequest: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "subject": "Read receipt for: World domination",
+         |            "textBody": "This receipt shows that the email has been 
displayed on your recipient's computer. ",
+         |            "disposition": {
+         |              "actionMode": "invalidAction",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val mdnSendResponse: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(mdnSendRequest)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(mdnSendResponse)
+      .inPath(s"methodResponses[0][1].notSent")
+      .isEqualTo("""{
+                   |    "k1546": {
+                   |        "type": "invalidArguments",
+                   |        "description": "Disposition \"ActionMode\" is 
invalid.",
+                   |        "properties":["disposition"]
+                   |    }
+                   |}""".stripMargin)
+  }
+
+  @Test
+  def mdnSendShouldBeFailWhenFinalRecipientIsInvalid(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+
+    val mdnSendRequest: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "subject": "Read receipt for: World domination",
+         |            "textBody": "This receipt shows that the email has been 
displayed on your recipient's computer. ",
+         |            "finalRecipient" : "invalid",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val mdnSendResponse: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(mdnSendRequest)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(mdnSendResponse)
+      .inPath(s"methodResponses[0][1].notSent")
+      .isEqualTo("""{
+                   |    "k1546": {
+                   |        "type": "invalidArguments",
+                   |        "description": "FinalRecipient can't be parse.",
+                   |        "properties": [
+                   |            "finalRecipient"
+                   |        ]
+                   |    }
+                   |}""".stripMargin)
+  }
+
+  @Test
+  def 
mdnSendShouldBeFailWhenIdentityIsNotAllowedToUseFinalRecipient(guiceJamesServer:
 GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+
+    val mdnSendRequest: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "subject": "Read receipt for: World domination",
+         |            "textBody": "This receipt shows that the email has been 
displayed on your recipient's computer. ",
+         |            "finalRecipient" : "rfc822; ${CEDRIC.asString}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val mdnSendResponse: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(mdnSendRequest)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(mdnSendResponse)
+      .inPath(s"methodResponses[0][1].notSent")
+      .isEqualTo("""{
+                   |    "k1546": {
+                   |        "type": "forbiddenFrom",
+                   |        "description": "The user is not allowed to use the 
given \"finalRecipient\" property"
+                   |    }
+                   |}""".stripMargin)
+  }
+
+  @Test
+  def implicitEmailSetShouldNotBeAttemptedWhenMDNIsNotSent(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+
+    val mdnSendRequest: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "subject": "Read receipt for: World domination",
+         |            "textBody": "This receipt shows that the email has been 
displayed on your recipient's computer. ",
+         |            "finalRecipient" : "invalid",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val mdnSendResponse: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(mdnSendRequest)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(mdnSendResponse)
+      .inPath("methodResponses[1]")
+      .isAbsent()
+  }
+
+  @Test
+  def 
implicitEmailSetShouldNotBeAttemptedWhenOnSuccessUpdateEmailIsNull(guiceJamesServer:
 GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+
+    val bobMailBoxPath: MailboxPath = MailboxPath.inbox(BOB)
+    mailboxProbe.createMailbox(bobMailBoxPath)
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+
+    val mdnSendRequest: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "subject": "Read receipt for: World domination",
+         |            "textBody": "This receipt shows that the email has been 
displayed on your recipient's computer. ",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val mdnSendResponse: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(mdnSendRequest)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(mdnSendResponse)
+      .whenIgnoringPaths("methodResponses[1][1].newState",
+        "methodResponses[1][1].oldState")
+      .isEqualTo(
+        s"""{
+           |    "sessionState": "${SESSION_STATE.value}",
+           |    "methodResponses": [
+           |        [
+           |            "MDN/send",
+           |            {
+           |                "accountId": "$ANDRE_ACCOUNT_ID",
+           |                "sent": {
+           |                    "k1546": {
+           |                        "finalRecipient": "rfc822; 
${ANDRE.asString}",
+           |                        "includeOriginalMessage": false,
+           |                        "originalRecipient": "rfc822; 
${ANDRE.asString}"
+           |                    }
+           |                }
+           |            },
+           |            "c1"
+           |        ]
+           |    ]
+           |}""".stripMargin)
+  }
+
+  @Test
+  def mdnSendShouldAcceptSeveralMDNObjects(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+
+    val bobMailBoxPath: MailboxPath = MailboxPath.inbox(BOB)
+    mailboxProbe.createMailbox(bobMailBoxPath)
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val relatedEmailId1: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+    val relatedEmailId2: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("2")))
+      .getMessageId
+    val relatedEmailId3: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("3")))
+      .getMessageId
+
+    val mdnSendRequest: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId1.serialize()}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          },
+         |          "k1547": {
+         |            "forEmailId": "${relatedEmailId2.serialize()}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          },
+         |          "k1548": {
+         |            "forEmailId": "${relatedEmailId3.serialize()}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/$$mdnsent": true
+         |          },
+         |          "#k1547": {
+         |            "keywords/$$mdnsent": true
+         |          },
+         |          "#k1548": {
+         |            "keywords/$$mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+   val mdnSendResponse: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(mdnSendRequest)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(mdnSendResponse)
+      .whenIgnoringPaths("methodResponses[1][1].newState",
+        "methodResponses[1][1].oldState")
+      .isEqualTo(
+        s"""{
+           |   "sessionState": "${SESSION_STATE.value}",
+           |   "methodResponses": [
+           |           [
+           |                   "MDN/send",
+           |                   {
+           |                           "accountId": "$ANDRE_ACCOUNT_ID",
+           |                           "sent": {
+           |                                   "k1546": {
+           |                                           "subject": "[Received] 
Subject of original message1",
+           |                                           "textBody": "The email 
has been displayed on your recipient's computer",
+           |                                           "originalRecipient": 
"rfc822; ${ANDRE.asString()}",
+           |                                           "finalRecipient": 
"rfc822; ${ANDRE.asString()}",
+           |                                           
"includeOriginalMessage": false
+           |                                   },
+           |                                   "k1547": {
+           |                                           "subject": "[Received] 
Subject of original message2",
+           |                                           "textBody": "The email 
has been displayed on your recipient's computer",
+           |                                           "originalRecipient": 
"rfc822; ${ANDRE.asString()}",
+           |                                           "finalRecipient": 
"rfc822; ${ANDRE.asString()}",
+           |                                           
"includeOriginalMessage": false
+           |                                   },
+           |                                   "k1548": {
+           |                                           "subject": "[Received] 
Subject of original message3",
+           |                                           "textBody": "The email 
has been displayed on your recipient's computer",
+           |                                           "originalRecipient": 
"rfc822; ${ANDRE.asString()}",
+           |                                           "finalRecipient": 
"rfc822; ${ANDRE.asString()}",
+           |                                           
"includeOriginalMessage": false
+           |                                   }
+           |                           }
+           |                   },
+           |                   "c1"
+           |           ],
+           |           [
+           |                   "Email/set",
+           |                   {
+           |                           "accountId": "$ANDRE_ACCOUNT_ID",
+           |                           "oldState": 
"3be4a1bc-0b41-4e33-aaf0-585e567a5af5",
+           |                           "newState": 
"3e1d5c70-9ca4-4c02-a35c-f54a51d253e3",
+           |                           "updated": {
+           |                                   
"${relatedEmailId1.serialize()}": null,
+           |                                   
"${relatedEmailId2.serialize()}": null,
+           |                                   
"${relatedEmailId3.serialize()}": null
+           |                           }
+           |                   },
+           |                   "c1"
+           |           ]
+           |   ]
+           |}""".stripMargin)
+  }
+
+  @Test
+  def mdnSendMixValidAndNotFoundAndInvalid(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+
+    val bobMailBoxPath: MailboxPath = MailboxPath.inbox(BOB)
+    mailboxProbe.createMailbox(bobMailBoxPath)
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val validEmailId1: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+    val validEmailId2: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(buildOriginalMessage("2")))
+      .getMessageId
+
+    val mdnSendRequest: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${validEmailId1.serialize()}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          },
+         |          "k1547": {
+         |            "forEmailId": "${validEmailId2.serialize()}",
+         |            "badProperty": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          },
+         |          "k1548": {
+         |            "forEmailId": "${randomMessageId.serialize()}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/$$mdnsent": true
+         |          },
+         |          "#k1547": {
+         |            "keywords/$$mdnsent": true
+         |          },
+         |          "#k1548": {
+         |            "keywords/$$mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+   val mdnSendResponse: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(mdnSendRequest)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(mdnSendResponse)
+      .whenIgnoringPaths("methodResponses[1][1].newState",
+        "methodResponses[1][1].oldState")
+      .isEqualTo(s"""{
+                   |    "sessionState": "${SESSION_STATE.value}",
+                   |    "methodResponses": [
+                   |        [
+                   |            "MDN/send",
+                   |            {
+                   |                "accountId": "$ANDRE_ACCOUNT_ID",
+                   |                "sent": {
+                   |                    "k1546": {
+                   |                        "subject": "[Received] Subject of 
original message1",
+                   |                        "textBody": "The email has been 
displayed on your recipient's computer",
+                   |                        "originalRecipient": "rfc822; 
${ANDRE.asString()}",
+                   |                        "finalRecipient": "rfc822; 
${ANDRE.asString()}",
+                   |                        "includeOriginalMessage": false
+                   |                    }
+                   |                },
+                   |                "notSent": {
+                   |                    "k1547": {
+                   |                        "type": "invalidArguments",
+                   |                        "description": "Some unknown 
properties were specified",
+                   |                        "properties": [
+                   |                            "badProperty"
+                   |                        ]
+                   |                    },
+                   |                    "k1548": {
+                   |                        "type": "notFound",
+                   |                        "description": "The reference 
\\"forEmailId\\" cannot be found."
+                   |                    }
+                   |                }
+                   |            },
+                   |            "c1"
+                   |        ],
+                   |        [
+                   |            "Email/set",
+                   |            {
+                   |                "accountId": 
"1e8584548eca20f26faf6becc1704a0f352839f12c208a47fbd486d60f491f7c",
+                   |                "oldState": 
"eda83b09-6aca-4215-b493-2b4af19c50f0",
+                   |                "newState": 
"8bd671b2-e9fd-4ce3-b9b2-c3e1f35cc8ee",
+                   |                "updated": {
+                   |                    "${validEmailId1.serialize()}": null
+                   |                }
+                   |            },
+                   |            "c1"
+                   |        ]
+                   |    ]
+                   |}""".stripMargin)
+  }
+
+  @Test
+  def mdnSendShouldBeFailWhenMDNHasAlreadyBeenSet(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val path: MailboxPath = MailboxPath.inbox(BOB)
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+    mailboxProbe.createMailbox(path)
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(BOB.asString(), path, AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+
+    val request: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ACCOUNT_ID",
+         |        "identityId": "$IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/$$mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    `given`
+      .header(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+      .body(request)
+    .when
+      .post
+    .`then`
+      .statusCode(SC_OK)
+      .contentType(JSON)
+
+    val response: String = `given`
+      .header(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+      .body(request)
+    .when
+      .post
+    .`then`
+      .statusCode(SC_OK)
+      .contentType(JSON)
+      .extract
+      .body
+      .asString
+
+    assertThatJson(response)
+      .inPath(s"methodResponses[0][1].notSent")
+      .isEqualTo("""{
+                   |    "k1546": {
+                   |        "type": "mdnAlreadySent",
+                   |        "description": "The message has the $mdnsent 
keyword already set."
+                   |    }
+                   |}""".stripMargin)
+  }
+
+  @Test
+  def mdnSendShouldReturnUnknownMethodWhenMissingOneCapability(): Unit = {
+    val request: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "ue150411c",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "Md45b47b4877521042cec0938",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val response: String = `given`
+      .header(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+      .body(request)
+    .when
+      .post
+    .`then`
+      .statusCode(SC_OK)
+      .contentType(JSON)
+      .extract
+      .body
+      .asString
+
+    assertThatJson(response).isEqualTo(
+      s"""{
+         |  "sessionState": "${SESSION_STATE.value}",
+         |  "methodResponses": [[
+         |    "error",
+         |    {
+         |      "type": "unknownMethod",
+         |      "description": "Missing capability(ies): 
urn:ietf:params:jmap:mdn"
+         |    },
+         |    "c1"]]
+         |}""".stripMargin)
+  }
+
+  @Test
+  def mdnSendShouldReturnUnknownMethodWhenMissingAllCapabilities(): Unit = {
+    val request =
+      s"""{
+         |  "using": [],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "ue150411c",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "Md45b47b4877521042cec0938",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val response = `given`
+      .header(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+      .body(request)
+    .when
+      .post
+    .`then`
+      .statusCode(SC_OK)
+      .contentType(JSON)
+      .extract
+      .body
+      .asString
+
+    assertThatJson(response).isEqualTo(
+      s"""{
+         |  "sessionState": "${SESSION_STATE.value}",
+         |  "methodResponses": [[
+         |    "error",
+         |    {
+         |      "type": "unknownMethod",
+         |      "description": "Missing capability(ies): 
urn:ietf:params:jmap:mdn, urn:ietf:params:jmap:mail, urn:ietf:params:jmap:core"
+         |    },
+         |    "c1"]]
+         |}""".stripMargin)
+  }
+
+  @Test
+  def mdnSendShouldReturnNotFoundWhenForEmailIdIsNotExist(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val path: MailboxPath = MailboxPath.inbox(BOB)
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+    mailboxProbe.createMailbox(path)
+
+    val request: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ACCOUNT_ID",
+         |        "identityId": "$IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${randomMessageId.serialize()}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val response = `given`
+      .header(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+      .body(request)
+    .when
+      .post
+    .`then`
+      .statusCode(SC_OK)
+      .contentType(JSON)
+      .extract
+      .body
+      .asString
+
+    assertThatJson(response)
+      .inPath("methodResponses[0][1].notSent")
+      .isEqualTo("""{
+                   |    "k1546": {
+                   |        "type": "notFound",
+                   |        "description": "The reference \"forEmailId\" 
cannot be found."
+                   |    }
+                   |}""".stripMargin)
+  }
+
+  @Test
+  def 
mdnSendShouldReturnNotFoundWhenMessageRelateHasNotDispositionNotificationTo(guiceJamesServer:
 GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+
+    val bobMailBoxPath: MailboxPath = MailboxPath.inbox(BOB)
+    mailboxProbe.createMailbox(bobMailBoxPath)
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val message: Message = Message.Builder
+      .of
+      .setSubject("test")
+      .setSender(BOB.asString)
+      .setFrom(BOB.asString)
+      .setTo(ANDRE.asString)
+      .setBody("Body of mail, that mdn related", StandardCharsets.UTF_8)
+      .build
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(message))
+      .getMessageId
+
+    val request: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val response: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(request)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(response)
+      .inPath("methodResponses[0][1].notSent")
+      .isEqualTo("""{
+                    |    "k1546": {
+                    |        "type": "notFound",
+                    |        "description": "Invalid 
\"Disposition-Notification-To\" header field."
+                    |    }
+                    |}""".stripMargin)
+  }
+
+  @Test
+  def mdnSendShouldReturnNotFoundWhenIdentityDoesNotExist(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+
+    val bobMailBoxPath: MailboxPath = MailboxPath.inbox(BOB)
+    mailboxProbe.createMailbox(bobMailBoxPath)
+
+    val andreMailBoxPath: MailboxPath = MailboxPath.inbox(ANDRE)
+    mailboxProbe.createMailbox(andreMailBoxPath)
+
+    val message: Message = Message.Builder
+      .of
+      .setSubject("test")
+      .setSender(BOB.asString)
+      .setFrom(BOB.asString)
+      .setTo(ANDRE.asString)
+      .setBody("Body of mail, that mdn related", StandardCharsets.UTF_8)
+      .build
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(ANDRE.asString(), andreMailBoxPath, 
AppendCommand.builder()
+        .build(message))
+      .getMessageId
+
+    val request: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "$ANDRE_ACCOUNT_ID",
+         |        "identityId": "notFound",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val response: String =
+      `given`(
+        baseRequestSpecBuilder(guiceJamesServer)
+          .setAuth(authScheme(UserCredential(ANDRE, ANDRE_PASSWORD)))
+          .addHeader(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+          .setBody(request)
+          .build, new ResponseSpecBuilder().build)
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(response)
+      .isEqualTo(s"""{
+                   |    "sessionState": "${SESSION_STATE.value}",
+                   |    "methodResponses": [
+                   |        [
+                   |            "error",
+                   |            {
+                   |                "type": "invalidArguments",
+                   |                "description": "The IdentityId cannot be 
found"
+                   |            },
+                   |            "c1"
+                   |        ]
+                   |    ]
+                   |}""".stripMargin)
+  }
+
+  @Test
+  def mdnSendShouldBeFailWhenWrongAccountId(guiceJamesServer: 
GuiceJamesServer): Unit = {
+    val path: MailboxPath = MailboxPath.inbox(BOB)
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+    mailboxProbe.createMailbox(path)
+
+    val request: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": "unknownAccountId",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "1",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#k1546": {
+         |            "keywords/mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val response: String =
+      `given`
+        .header(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+        .body(request)
+      .when
+        .post
+      .`then`
+        .statusCode(SC_OK)
+        .contentType(JSON)
+        .extract
+        .body
+        .asString
+
+    assertThatJson(response).isEqualTo(
+      s"""{
+         |    "sessionState": "${SESSION_STATE.value}",
+         |    "methodResponses": [[
+         |            "error",
+         |            {
+         |                "type": "accountNotFound"
+         |            },
+         |            "c1"
+         |        ]]
+         |}""".stripMargin)
+  }
+
+  @Test
+  def 
mdnSendShouldBeFailWhenOnSuccessUpdateEmailMissesTheCreationIdSharp(guiceJamesServer:
 GuiceJamesServer): Unit = {
+    val path: MailboxPath = MailboxPath.inbox(BOB)
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+    mailboxProbe.createMailbox(path)
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(BOB.asString(), path, AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+
+    val request: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": 
"29883977c13473ae7cb7678ef767cbfbaffc8a44a6e463d971d23a65c1dc4af6",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "subject": "Read receipt for: World domination",
+         |            "textBody": "This receipt shows that the email has been 
displayed on your recipient's computer. ",
+         |            "reportingUA": "joes-pc.cs.example.com; Foomail 97.1",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "notStored": {
+         |            "keywords/$$mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val response: String = `given`
+      .header(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+      .body(request)
+    .when
+      .post
+    .`then`
+      .statusCode(SC_OK)
+      .contentType(JSON)
+      .extract
+      .body
+      .asString
+
+    assertThatJson(response)
+      .inPath("methodResponses[0]")
+      .isEqualTo(
+        s"""[
+           |    "error",
+           |    {
+           |        "type": "invalidArguments",
+           |        "description": "notStored cannot be retrieved as storage 
for MDNSend is not yet implemented"
+           |    },
+           |    "c1"
+           |]""".stripMargin)
+  }
+
+  @Test
+  def 
mdnSendShouldBeFailWhenOnSuccessUpdateEmailDoesNotReferenceACreationWithinThisCall(guiceJamesServer:
 GuiceJamesServer): Unit = {
+    val path: MailboxPath = MailboxPath.inbox(BOB)
+    val mailboxProbe: MailboxProbeImpl = 
guiceJamesServer.getProbe(classOf[MailboxProbeImpl])
+    mailboxProbe.createMailbox(path)
+
+    val relatedEmailId: MessageId = mailboxProbe
+      .appendMessage(BOB.asString(), path, AppendCommand.builder()
+        .build(buildOriginalMessage("1")))
+      .getMessageId
+
+    val request: String =
+      s"""{
+         |  "using": [
+         |    "urn:ietf:params:jmap:core",
+         |    "urn:ietf:params:jmap:mail",
+         |    "urn:ietf:params:jmap:mdn"
+         |  ],
+         |  "methodCalls": [
+         |    [
+         |      "MDN/send",
+         |      {
+         |        "accountId": 
"29883977c13473ae7cb7678ef767cbfbaffc8a44a6e463d971d23a65c1dc4af6",
+         |        "identityId": "$ANDRE_IDENTITY_ID",
+         |        "send": {
+         |          "k1546": {
+         |            "forEmailId": "${relatedEmailId.serialize()}",
+         |            "subject": "Read receipt for: World domination",
+         |            "textBody": "This receipt shows that the email has been 
displayed on your recipient's computer. ",
+         |            "reportingUA": "joes-pc.cs.example.com; Foomail 97.1",
+         |            "disposition": {
+         |              "actionMode": "manual-action",
+         |              "sendingMode": "mdn-sent-manually",
+         |              "type": "displayed"
+         |            }
+         |          }
+         |        },
+         |        "onSuccessUpdateEmail": {
+         |          "#notReference": {
+         |            "keywords/$$mdnsent": true
+         |          }
+         |        }
+         |      },
+         |      "c1"
+         |    ]
+         |  ]
+         |}""".stripMargin
+
+    val response: String = `given`
+      .header(ACCEPT.toString, ACCEPT_RFC8621_VERSION_HEADER)
+      .body(request)
+    .when
+      .post
+    .`then`
+      .statusCode(SC_OK)
+      .contentType(JSON)
+      .extract
+      .body
+      .asString
+
+    assertThatJson(response)
+      .isEqualTo(
+        s"""{
+           |    "sessionState": "${SESSION_STATE.value}",
+           |    "methodResponses": [
+           |        [
+           |            "error",
+           |            {
+           |                "type": "invalidArguments",
+           |                "description": "#notReference cannot be referenced 
in current method call"
+           |            },
+           |            "c1"
+           |        ]
+           |    ]
+           |}""".stripMargin)
+  }
+
+  @Tag(TAG_MDN_MESSAGE_FORMAT)

Review comment:
       Why this tag?




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