This is an automated email from the ASF dual-hosted git repository.

rcordier pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/james-project.git

commit 8d3d4f1341f4da23866650565ccbf04464057cd7
Author: Benoit Tellier <[email protected]>
AuthorDate: Tue Dec 7 11:22:01 2021 +0700

    JAMES-3680 SMTP authentication requireSSL setting
---
 .../src/test/resources/smtpserver.xml              | 21 ++++---
 .../cassandra/src/test/resources/smtpserver.xml    | 21 ++++---
 .../james/protocols/lmtp/LMTPConfiguration.java    |  2 +-
 .../james/protocols/smtp/SMTPConfiguration.java    |  2 +-
 .../protocols/smtp/SMTPConfigurationImpl.java      |  2 +-
 .../james/protocols/smtp/SMTPSessionImpl.java      |  2 +-
 .../sample-configuration/smtpserver.xml            |  3 +
 .../src/test/resources/smtpserver.xml              |  3 +
 .../src/test/resources/smtpserver.xml              | 21 ++++---
 server/apps/demo/smtpserver.xml                    | 15 ++++-
 .../docs/modules/ROOT/pages/configure/smtp.adoc    |  4 ++
 .../sample-configuration/smtpserver.xml            |  3 +
 .../src/test/resources/smtpserver.xml              |  3 +
 .../sample-configuration/smtpserver.xml            |  3 +
 .../src/test/resources/smtpserver.xml              |  3 +
 .../jpa-app/sample-configuration/smtpserver.xml    |  3 +
 .../apps/jpa-app/src/test/resources/smtpserver.xml |  3 +
 .../sample-configuration/smtpserver.xml            |  3 +
 .../jpa-smtp-app/src/test/resources/smtpserver.xml |  3 +
 .../memory-app/sample-configuration/smtpserver.xml |  3 +
 .../memory-app/src/test/resources/smtpserver.xml   |  3 +
 .../spring-app/src/test/resources/smtpserver.xml   |  1 +
 .../webadmin-cli/src/test/resources/smtpserver.xml | 21 ++++---
 .../src/main/resources/smtpserver.xml              |  3 +
 .../src/test/resources/smtpserver.xml              |  1 +
 .../src/test/resources/smtpserver.xml              |  3 +
 .../src/test/resources/smtpserver.xml              |  1 +
 .../src/test/resources/smtpserver.xml              |  1 +
 .../apache/james/smtpserver/netty/SMTPServer.java  | 65 +++++++++++++++++-----
 .../james/smtpserver/SMTPTestConfiguration.java    |  1 +
 .../src/test/resources/smtpserver-dsn.xml          |  1 +
 .../src/test/resources/smtpserver.xml              |  1 +
 .../src/test/resources/smtpserver.xml              |  3 +
 src/site/xdoc/server/config-smtp-lmtp.xml          |  3 +
 34 files changed, 175 insertions(+), 56 deletions(-)

diff --git 
a/mpt/impl/smtp/cassandra-rabbitmq-object-storage/src/test/resources/smtpserver.xml
 
b/mpt/impl/smtp/cassandra-rabbitmq-object-storage/src/test/resources/smtpserver.xml
index 31b5d84..d05a93f 100644
--- 
a/mpt/impl/smtp/cassandra-rabbitmq-object-storage/src/test/resources/smtpserver.xml
+++ 
b/mpt/impl/smtp/cassandra-rabbitmq-object-storage/src/test/resources/smtpserver.xml
@@ -34,7 +34,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <authRequired>false</authRequired>
+        <auth>
+            <announce>never</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
         <addressBracketsEnforcement>true</addressBracketsEnforcement>
@@ -57,10 +60,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <!--
-           Authorize only local users
-        -->
-        <authRequired>true</authRequired>
+        <auth>
+            <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -84,10 +87,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <!--
-           Authorize only local users
-        -->
-        <authRequired>true</authRequired>
+        <auth>
+            <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
diff --git a/mpt/impl/smtp/cassandra/src/test/resources/smtpserver.xml 
b/mpt/impl/smtp/cassandra/src/test/resources/smtpserver.xml
index 31b5d84..d05a93f 100644
--- a/mpt/impl/smtp/cassandra/src/test/resources/smtpserver.xml
+++ b/mpt/impl/smtp/cassandra/src/test/resources/smtpserver.xml
@@ -34,7 +34,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <authRequired>false</authRequired>
+        <auth>
+            <announce>never</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
         <addressBracketsEnforcement>true</addressBracketsEnforcement>
@@ -57,10 +60,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <!--
-           Authorize only local users
-        -->
-        <authRequired>true</authRequired>
+        <auth>
+            <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -84,10 +87,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <!--
-           Authorize only local users
-        -->
-        <authRequired>true</authRequired>
+        <auth>
+            <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
diff --git 
a/protocols/lmtp/src/main/java/org/apache/james/protocols/lmtp/LMTPConfiguration.java
 
b/protocols/lmtp/src/main/java/org/apache/james/protocols/lmtp/LMTPConfiguration.java
index 29e94cb..a0e6695 100644
--- 
a/protocols/lmtp/src/main/java/org/apache/james/protocols/lmtp/LMTPConfiguration.java
+++ 
b/protocols/lmtp/src/main/java/org/apache/james/protocols/lmtp/LMTPConfiguration.java
@@ -37,7 +37,7 @@ public abstract class LMTPConfiguration extends 
ProtocolConfigurationImpl implem
     }
 
     @Override
-    public boolean isAuthAnnounced(String remoteIP) {
+    public boolean isAuthAnnounced(String remoteIP, boolean tlsStarted) {
         return false;
     }
 
diff --git 
a/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPConfiguration.java
 
b/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPConfiguration.java
index 71cf7c3..f979801 100644
--- 
a/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPConfiguration.java
+++ 
b/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPConfiguration.java
@@ -53,7 +53,7 @@ public interface SMTPConfiguration extends 
ProtocolConfiguration {
      * @param remoteIP the remote IP address in String form
      * @return whether SMTP authentication is on
      */
-    boolean isAuthAnnounced(String remoteIP);
+    boolean isAuthAnnounced(String remoteIP, boolean tlsStarted);
     
     /**
      * Returns whether the remote server needs to send a HELO/EHLO
diff --git 
a/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPConfigurationImpl.java
 
b/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPConfigurationImpl.java
index 14fa4f2..37ce4d9 100644
--- 
a/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPConfigurationImpl.java
+++ 
b/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPConfigurationImpl.java
@@ -54,7 +54,7 @@ public class SMTPConfigurationImpl extends 
ProtocolConfigurationImpl implements
      * Return <code>false</code>
      */
     @Override
-    public boolean isAuthAnnounced(String remoteIP) {
+    public boolean isAuthAnnounced(String remoteIP, boolean tlsStarted) {
         return false;
     }
 
diff --git 
a/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPSessionImpl.java
 
b/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPSessionImpl.java
index 3535d34..c583cf6 100644
--- 
a/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPSessionImpl.java
+++ 
b/protocols/smtp/src/main/java/org/apache/james/protocols/smtp/SMTPSessionImpl.java
@@ -66,7 +66,7 @@ public class SMTPSessionImpl extends ProtocolSessionImpl 
implements SMTPSession
 
     @Override
     public boolean isAuthAnnounced() {
-        return 
getConfiguration().isAuthAnnounced(getRemoteAddress().getAddress().getHostAddress());
+        return 
getConfiguration().isAuthAnnounced(getRemoteAddress().getAddress().getHostAddress(),
 isTLSStarted());
     }
 
     @Override
diff --git a/server/apps/cassandra-app/sample-configuration/smtpserver.xml 
b/server/apps/cassandra-app/sample-configuration/smtpserver.xml
index d02ddd5..4acb2ad 100644
--- a/server/apps/cassandra-app/sample-configuration/smtpserver.xml
+++ b/server/apps/cassandra-app/sample-configuration/smtpserver.xml
@@ -47,6 +47,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
@@ -86,6 +87,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
@@ -126,6 +128,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
diff --git a/server/apps/cassandra-app/src/test/resources/smtpserver.xml 
b/server/apps/cassandra-app/src/test/resources/smtpserver.xml
index 66c56eb..ca0fa2c 100644
--- a/server/apps/cassandra-app/src/test/resources/smtpserver.xml
+++ b/server/apps/cassandra-app/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -63,6 +64,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
@@ -92,6 +94,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
diff --git 
a/server/apps/cli-integration-tests/src/test/resources/smtpserver.xml 
b/server/apps/cli-integration-tests/src/test/resources/smtpserver.xml
index 61429fe..1193b94 100644
--- a/server/apps/cli-integration-tests/src/test/resources/smtpserver.xml
+++ b/server/apps/cli-integration-tests/src/test/resources/smtpserver.xml
@@ -33,7 +33,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <authRequired>false</authRequired>
+        <auth>
+            <announce>never</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <authorizedAddresses>0.0.0.0/0</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -57,10 +60,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <!--
-           Authorize only local users
-        -->
-        <authRequired>true</authRequired>
+        <auth>
+            <announce>true</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <authorizedAddresses>0.0.0.0/0</authorizedAddresses>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
@@ -85,10 +88,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <!--
-           Authorize only local users
-        -->
-        <authRequired>true</authRequired>
+        <auth>
+            <announce>true</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <authorizedAddresses>0.0.0.0/0</authorizedAddresses>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
diff --git a/server/apps/demo/smtpserver.xml b/server/apps/demo/smtpserver.xml
index 6e04fda..fea5111 100644
--- a/server/apps/demo/smtpserver.xml
+++ b/server/apps/demo/smtpserver.xml
@@ -33,7 +33,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <authRequired>false</authRequired>
+        <auth>
+            <announce>never</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -58,7 +61,10 @@
         <!--
            Authorize only local users
         -->
-        <authRequired>true</authRequired>
+        <auth>
+            <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
@@ -84,7 +90,10 @@
         <!--
            Authorize only local users
         -->
-        <authRequired>true</authRequired>
+        <auth>
+            <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
diff --git 
a/server/apps/distributed-app/docs/modules/ROOT/pages/configure/smtp.adoc 
b/server/apps/distributed-app/docs/modules/ROOT/pages/configure/smtp.adoc
index 8222b85..17ea4b3 100644
--- a/server/apps/distributed-app/docs/modules/ROOT/pages/configure/smtp.adoc
+++ b/server/apps/distributed-app/docs/modules/ROOT/pages/configure/smtp.adoc
@@ -83,6 +83,10 @@ regardless of this option.
 Please note that emails are only relayed if, and only if, the user did 
authenticate, or is in an authorized network,
 regardless of this option.
 
+| auth.requireSSL
+| This is an optional tag, defaults to true. If true, authentication is not 
advertised via capabilities on unencrypted
+channels.
+
 | authorizedAddresses
 | Authorize specific addresses/networks.
 
diff --git a/server/apps/distributed-app/sample-configuration/smtpserver.xml 
b/server/apps/distributed-app/sample-configuration/smtpserver.xml
index d02ddd5..4acb2ad 100644
--- a/server/apps/distributed-app/sample-configuration/smtpserver.xml
+++ b/server/apps/distributed-app/sample-configuration/smtpserver.xml
@@ -47,6 +47,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
@@ -86,6 +87,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
@@ -126,6 +128,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
diff --git a/server/apps/distributed-app/src/test/resources/smtpserver.xml 
b/server/apps/distributed-app/src/test/resources/smtpserver.xml
index aa98c05..1e68aa1 100644
--- a/server/apps/distributed-app/src/test/resources/smtpserver.xml
+++ b/server/apps/distributed-app/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <authorizedAddresses>0.0.0.0/0.0.0.0</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
@@ -61,6 +62,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
@@ -87,6 +89,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
diff --git 
a/server/apps/distributed-pop3-app/sample-configuration/smtpserver.xml 
b/server/apps/distributed-pop3-app/sample-configuration/smtpserver.xml
index 514a403..a2e9720 100644
--- a/server/apps/distributed-pop3-app/sample-configuration/smtpserver.xml
+++ b/server/apps/distributed-pop3-app/sample-configuration/smtpserver.xml
@@ -37,6 +37,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
@@ -66,6 +67,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
@@ -96,6 +98,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
diff --git a/server/apps/distributed-pop3-app/src/test/resources/smtpserver.xml 
b/server/apps/distributed-pop3-app/src/test/resources/smtpserver.xml
index a4e1bcf..8064b4b 100644
--- a/server/apps/distributed-pop3-app/src/test/resources/smtpserver.xml
+++ b/server/apps/distributed-pop3-app/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -60,6 +61,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
@@ -86,6 +88,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
diff --git a/server/apps/jpa-app/sample-configuration/smtpserver.xml 
b/server/apps/jpa-app/sample-configuration/smtpserver.xml
index d02ddd5..4acb2ad 100644
--- a/server/apps/jpa-app/sample-configuration/smtpserver.xml
+++ b/server/apps/jpa-app/sample-configuration/smtpserver.xml
@@ -47,6 +47,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
@@ -86,6 +87,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
@@ -126,6 +128,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
diff --git a/server/apps/jpa-app/src/test/resources/smtpserver.xml 
b/server/apps/jpa-app/src/test/resources/smtpserver.xml
index a4e1bcf..8064b4b 100644
--- a/server/apps/jpa-app/src/test/resources/smtpserver.xml
+++ b/server/apps/jpa-app/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -60,6 +61,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
@@ -86,6 +88,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
diff --git a/server/apps/jpa-smtp-app/sample-configuration/smtpserver.xml 
b/server/apps/jpa-smtp-app/sample-configuration/smtpserver.xml
index d02ddd5..4acb2ad 100644
--- a/server/apps/jpa-smtp-app/sample-configuration/smtpserver.xml
+++ b/server/apps/jpa-smtp-app/sample-configuration/smtpserver.xml
@@ -47,6 +47,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
@@ -86,6 +87,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
@@ -126,6 +128,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
diff --git a/server/apps/jpa-smtp-app/src/test/resources/smtpserver.xml 
b/server/apps/jpa-smtp-app/src/test/resources/smtpserver.xml
index a4e1bcf..8064b4b 100644
--- a/server/apps/jpa-smtp-app/src/test/resources/smtpserver.xml
+++ b/server/apps/jpa-smtp-app/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -60,6 +61,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
@@ -86,6 +88,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
diff --git a/server/apps/memory-app/sample-configuration/smtpserver.xml 
b/server/apps/memory-app/sample-configuration/smtpserver.xml
index d02ddd5..4acb2ad 100644
--- a/server/apps/memory-app/sample-configuration/smtpserver.xml
+++ b/server/apps/memory-app/sample-configuration/smtpserver.xml
@@ -47,6 +47,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
@@ -86,6 +87,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
@@ -126,6 +128,7 @@
         -->
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>true</requireSSL>
         </auth>
         <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
         <!-- Trust authenticated users -->
diff --git a/server/apps/memory-app/src/test/resources/smtpserver.xml 
b/server/apps/memory-app/src/test/resources/smtpserver.xml
index a4e1bcf..8064b4b 100644
--- a/server/apps/memory-app/src/test/resources/smtpserver.xml
+++ b/server/apps/memory-app/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -60,6 +61,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
@@ -86,6 +88,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
diff --git a/server/apps/spring-app/src/test/resources/smtpserver.xml 
b/server/apps/spring-app/src/test/resources/smtpserver.xml
index abc6145..dd71a86 100644
--- a/server/apps/spring-app/src/test/resources/smtpserver.xml
+++ b/server/apps/spring-app/src/test/resources/smtpserver.xml
@@ -38,6 +38,7 @@
     <authorizedAddresses>127.0.0.0/8</authorizedAddresses>
     <auth>
       <announce>forUnauthorizedAddresses</announce>
+      <requireSSL>false</requireSSL>
     </auth>
     <verifyIdentity>true</verifyIdentity>
     <maxmessagesize>0</maxmessagesize>
diff --git a/server/apps/webadmin-cli/src/test/resources/smtpserver.xml 
b/server/apps/webadmin-cli/src/test/resources/smtpserver.xml
index 61429fe..f7571b8 100644
--- a/server/apps/webadmin-cli/src/test/resources/smtpserver.xml
+++ b/server/apps/webadmin-cli/src/test/resources/smtpserver.xml
@@ -33,7 +33,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <authRequired>false</authRequired>
+        <auth>
+            <announce>never</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <authorizedAddresses>0.0.0.0/0</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -57,10 +60,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <!--
-           Authorize only local users
-        -->
-        <authRequired>true</authRequired>
+        <auth>
+            <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <authorizedAddresses>0.0.0.0/0</authorizedAddresses>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
@@ -85,10 +88,10 @@
         <connectiontimeout>360</connectiontimeout>
         <connectionLimit>0</connectionLimit>
         <connectionLimitPerIP>0</connectionLimitPerIP>
-        <!--
-           Authorize only local users
-        -->
-        <authRequired>true</authRequired>
+        <auth>
+            <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
+        </auth>
         <authorizedAddresses>0.0.0.0/0</authorizedAddresses>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
diff --git 
a/server/mailet/integration-testing/src/main/resources/smtpserver.xml 
b/server/mailet/integration-testing/src/main/resources/smtpserver.xml
index 50a96c5..6399266 100644
--- a/server/mailet/integration-testing/src/main/resources/smtpserver.xml
+++ b/server/mailet/integration-testing/src/main/resources/smtpserver.xml
@@ -37,6 +37,9 @@
 {{#hasAuthorizedAddresses}}
         <authorizedAddresses>{{authorizedAddresses}}</authorizedAddresses>
 {{/hasAuthorizedAddresses}}
+        <auth>
+            <requireSSL>false</requireSSL>
+        </auth>
         <verifyIdentity>{{verifyIdentity}}</verifyIdentity>
         <maxmessagesize>{{maxmessagesize}}</maxmessagesize>
         
<addressBracketsEnforcement>{{bracketEnforcement}}</addressBracketsEnforcement>
diff --git 
a/server/protocols/jmap-draft-integration-testing/memory-jmap-draft-integration-testing/src/test/resources/smtpserver.xml
 
b/server/protocols/jmap-draft-integration-testing/memory-jmap-draft-integration-testing/src/test/resources/smtpserver.xml
index 3a0a35f..b6d0516 100644
--- 
a/server/protocols/jmap-draft-integration-testing/memory-jmap-draft-integration-testing/src/test/resources/smtpserver.xml
+++ 
b/server/protocols/jmap-draft-integration-testing/memory-jmap-draft-integration-testing/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
diff --git 
a/server/protocols/jmap-draft-integration-testing/rabbitmq-jmap-draft-integration-testing/src/test/resources/smtpserver.xml
 
b/server/protocols/jmap-draft-integration-testing/rabbitmq-jmap-draft-integration-testing/src/test/resources/smtpserver.xml
index a4e1bcf..8064b4b 100644
--- 
a/server/protocols/jmap-draft-integration-testing/rabbitmq-jmap-draft-integration-testing/src/test/resources/smtpserver.xml
+++ 
b/server/protocols/jmap-draft-integration-testing/rabbitmq-jmap-draft-integration-testing/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
@@ -60,6 +61,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
@@ -86,6 +88,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <!-- Trust authenticated users -->
         <verifyIdentity>false</verifyIdentity>
diff --git 
a/server/protocols/jmap-rfc-8621-integration-tests/distributed-jmap-rfc-8621-integration-tests/src/test/resources/smtpserver.xml
 
b/server/protocols/jmap-rfc-8621-integration-tests/distributed-jmap-rfc-8621-integration-tests/src/test/resources/smtpserver.xml
index 3a0a35f..b6d0516 100644
--- 
a/server/protocols/jmap-rfc-8621-integration-tests/distributed-jmap-rfc-8621-integration-tests/src/test/resources/smtpserver.xml
+++ 
b/server/protocols/jmap-rfc-8621-integration-tests/distributed-jmap-rfc-8621-integration-tests/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <verifyIdentity>false</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
diff --git 
a/server/protocols/jmap-rfc-8621-integration-tests/memory-jmap-rfc-8621-integration-tests/src/test/resources/smtpserver.xml
 
b/server/protocols/jmap-rfc-8621-integration-tests/memory-jmap-rfc-8621-integration-tests/src/test/resources/smtpserver.xml
index c030905..75203c0 100644
--- 
a/server/protocols/jmap-rfc-8621-integration-tests/memory-jmap-rfc-8621-integration-tests/src/test/resources/smtpserver.xml
+++ 
b/server/protocols/jmap-rfc-8621-integration-tests/memory-jmap-rfc-8621-integration-tests/src/test/resources/smtpserver.xml
@@ -36,6 +36,7 @@
         <authRequired>false</authRequired>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <maxmessagesize>0</maxmessagesize>
         <addressBracketsEnforcement>true</addressBracketsEnforcement>
diff --git 
a/server/protocols/protocols-smtp/src/main/java/org/apache/james/smtpserver/netty/SMTPServer.java
 
b/server/protocols/protocols-smtp/src/main/java/org/apache/james/smtpserver/netty/SMTPServer.java
index 440c30a..bc9c8ef 100644
--- 
a/server/protocols/protocols-smtp/src/main/java/org/apache/james/smtpserver/netty/SMTPServer.java
+++ 
b/server/protocols/protocols-smtp/src/main/java/org/apache/james/smtpserver/netty/SMTPServer.java
@@ -73,11 +73,11 @@ public class SMTPServer extends AbstractProtocolAsyncServer 
implements SMTPServe
         public static AuthenticationAnnounceMode parse(String 
authRequiredString) {
             String sanitized = 
authRequiredString.trim().toLowerCase(Locale.US);
             switch (sanitized) {
-                case "forUnauthorizedAddresses":
+                case "forunauthorizedaddresses":
                     return FOR_UNAUTHORIZED_ADDRESSES;
                 case "always":
                     return ALWAYS;
-                case "neven":
+                case "never":
                     return NEVER;
                 default:
                     throw new RuntimeException("Unknown value for 
'auth.announce': " + authRequiredString + ". Should be one of always, never, 
forUnauthorizedAddresses");
@@ -85,10 +85,47 @@ public class SMTPServer extends AbstractProtocolAsyncServer 
implements SMTPServe
         }
     }
 
+    public static class AuthenticationConfiguration {
+        public static AuthenticationConfiguration 
parse(HierarchicalConfiguration<ImmutableNode> configuration) {
+            return Optional.ofNullable(configuration.configurationAt("auth"))
+                .map(authConfiguration -> parse(configuration, 
authConfiguration))
+                .orElseGet(() -> new 
AuthenticationConfiguration(fallbackAuthenticationAnnounceMode(configuration), 
false));
+        }
+
+        private static AuthenticationConfiguration 
parse(HierarchicalConfiguration<ImmutableNode> configuration, 
HierarchicalConfiguration<ImmutableNode> authConfiguration) {
+            return new AuthenticationConfiguration(
+                Optional.ofNullable(authConfiguration.getString("announce", 
null))
+                    .map(AuthenticationAnnounceMode::parse)
+                    .orElseGet(() -> 
fallbackAuthenticationAnnounceMode(configuration)),
+                Optional.ofNullable(authConfiguration.getBoolean("requireSSL", 
null))
+                    .orElse(false));
+        }
+
+        private static AuthenticationAnnounceMode 
fallbackAuthenticationAnnounceMode(HierarchicalConfiguration<ImmutableNode> 
configuration) {
+            return 
AuthenticationAnnounceMode.parseFallback(configuration.getString("authRequired",
 "false"));
+        }
+
+        private final AuthenticationAnnounceMode authenticationAnnounceMode;
+        private final boolean requireSSL;
+
+        public AuthenticationConfiguration(AuthenticationAnnounceMode 
authenticationAnnounceMode, boolean requireSSL) {
+            this.authenticationAnnounceMode = authenticationAnnounceMode;
+            this.requireSSL = requireSSL;
+        }
+
+        public AuthenticationAnnounceMode getAuthenticationAnnounceMode() {
+            return authenticationAnnounceMode;
+        }
+
+        public boolean isRequireSSL() {
+            return requireSSL;
+        }
+    }
+
     /**
      * Whether authentication is required to use this SMTP server.
      */
-    private AuthenticationAnnounceMode authRequired = NEVER;
+    private AuthenticationConfiguration authenticationConfiguration;
     
     /**
      * Whether the server needs helo to be send first
@@ -164,10 +201,7 @@ public class SMTPServer extends 
AbstractProtocolAsyncServer implements SMTPServe
     public void doConfigure(HierarchicalConfiguration<ImmutableNode> 
configuration) throws ConfigurationException {
         super.doConfigure(configuration);
         if (isEnabled()) {
-            authRequired = 
Optional.ofNullable(configuration.configurationAt("auth"))
-                .flatMap(authConfiguration -> 
Optional.ofNullable(configuration.getString("auth.announce", null)))
-                .map(AuthenticationAnnounceMode::parse)
-                .orElseGet(() -> 
AuthenticationAnnounceMode.parseFallback(configuration.getString("authRequired",
 "false")));
+            authenticationConfiguration = 
AuthenticationConfiguration.parse(configuration);
 
             authorizedAddresses = 
configuration.getString("authorizedAddresses", null);
 
@@ -190,7 +224,7 @@ public class SMTPServer extends AbstractProtocolAsyncServer 
implements SMTPServe
 
             verifyIdentity = configuration.getBoolean("verifyIdentity", false);
 
-            if (authRequired == NEVER && verifyIdentity) {
+            if (authenticationConfiguration.getAuthenticationAnnounceMode() == 
NEVER && verifyIdentity) {
                 throw new ConfigurationException(
                     "SMTP configuration: 'verifyIdentity' can't be set to true 
if 'authRequired' is set to false.");
             }
@@ -245,14 +279,19 @@ public class SMTPServer extends 
AbstractProtocolAsyncServer implements SMTPServe
         }
 
         @Override
-        public boolean isAuthAnnounced(String remoteIP) {
-            if (SMTPServer.this.authRequired == ALWAYS) {
+        public boolean isAuthAnnounced(String remoteIP, boolean tlsStarted) {
+            if (authenticationConfiguration.requireSSL && !tlsStarted) {
+                return false;
+            }
+            if (authenticationConfiguration.getAuthenticationAnnounceMode() == 
ALWAYS) {
                 return true;
             }
-            if (SMTPServer.this.authRequired == NEVER) {
+            if (authenticationConfiguration.getAuthenticationAnnounceMode() == 
NEVER) {
                 return false;
             }
-            return 
!SMTPServer.this.authorizedNetworks.matchInetNetwork(remoteIP);
+            return Optional.ofNullable(authorizedNetworks)
+                .map(nets -> !nets.matchInetNetwork(remoteIP))
+                .orElse(true);
         }
 
         /**
@@ -336,6 +375,6 @@ public class SMTPServer extends AbstractProtocolAsyncServer 
implements SMTPServe
     }
 
     public AuthenticationAnnounceMode getAuthRequired() {
-        return authRequired;
+        return authenticationConfiguration.getAuthenticationAnnounceMode();
     }
 }
diff --git 
a/server/protocols/protocols-smtp/src/test/java/org/apache/james/smtpserver/SMTPTestConfiguration.java
 
b/server/protocols/protocols-smtp/src/test/java/org/apache/james/smtpserver/SMTPTestConfiguration.java
index ba8f589..2718665 100644
--- 
a/server/protocols/protocols-smtp/src/test/java/org/apache/james/smtpserver/SMTPTestConfiguration.java
+++ 
b/server/protocols/protocols-smtp/src/test/java/org/apache/james/smtpserver/SMTPTestConfiguration.java
@@ -135,6 +135,7 @@ public class SMTPTestConfiguration extends 
BaseHierarchicalConfiguration {
         addProperty("tls.[@startTLS]", startTLS);
         addProperty("tls.keystore", "test_keystore");
         addProperty("tls.secret", "jamestest");
+        addProperty("auth.requireSSL", false);
         addProperty("verifyIdentity", verifyIdentity);
 
         // add the rbl handler
diff --git 
a/server/protocols/protocols-smtp/src/test/resources/smtpserver-dsn.xml 
b/server/protocols/protocols-smtp/src/test/resources/smtpserver-dsn.xml
index 25f7929..742922d 100644
--- a/server/protocols/protocols-smtp/src/test/resources/smtpserver-dsn.xml
+++ b/server/protocols/protocols-smtp/src/test/resources/smtpserver-dsn.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <verifyIdentity>true</verifyIdentity>
         <maxmessagesize>0</maxmessagesize>
diff --git 
a/server/protocols/webadmin-integration-test/distributed-webadmin-integration-test/src/test/resources/smtpserver.xml
 
b/server/protocols/webadmin-integration-test/distributed-webadmin-integration-test/src/test/resources/smtpserver.xml
index 2ffd9aa..d0d8f01 100644
--- 
a/server/protocols/webadmin-integration-test/distributed-webadmin-integration-test/src/test/resources/smtpserver.xml
+++ 
b/server/protocols/webadmin-integration-test/distributed-webadmin-integration-test/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <authorizedAddresses>0.0.0.0/0</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
diff --git 
a/server/protocols/webadmin-integration-test/memory-webadmin-integration-test/src/test/resources/smtpserver.xml
 
b/server/protocols/webadmin-integration-test/memory-webadmin-integration-test/src/test/resources/smtpserver.xml
index 965bb6b..f7571b8 100644
--- 
a/server/protocols/webadmin-integration-test/memory-webadmin-integration-test/src/test/resources/smtpserver.xml
+++ 
b/server/protocols/webadmin-integration-test/memory-webadmin-integration-test/src/test/resources/smtpserver.xml
@@ -35,6 +35,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>never</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <authorizedAddresses>0.0.0.0/0</authorizedAddresses>
         <verifyIdentity>false</verifyIdentity>
@@ -61,6 +62,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <authorizedAddresses>0.0.0.0/0</authorizedAddresses>
         <!-- Trust authenticated users -->
@@ -88,6 +90,7 @@
         <connectionLimitPerIP>0</connectionLimitPerIP>
         <auth>
             <announce>forUnauthorizedAddresses</announce>
+            <requireSSL>false</requireSSL>
         </auth>
         <authorizedAddresses>0.0.0.0/0</authorizedAddresses>
         <!-- Trust authenticated users -->
diff --git a/src/site/xdoc/server/config-smtp-lmtp.xml 
b/src/site/xdoc/server/config-smtp-lmtp.xml
index dc52e36..688ebbb 100644
--- a/src/site/xdoc/server/config-smtp-lmtp.xml
+++ b/src/site/xdoc/server/config-smtp-lmtp.xml
@@ -99,6 +99,9 @@
 
             Please note that emails are only relayed if, and only if, the user 
did authenticate, or is in an authorized network,
             regardless of this option.</dd>
+      <dt><strong>auth.requireSSL</strong></dt>
+      <dd>This is an optional tag, defaults to true. If true, authentication 
is not advertised via capabilities on unencrypted
+          channels.</dd>
       <dt><strong>handler.authorizedAddresses</strong></dt>
       <dd>Authorize specific addresses/networks.
                If you use SMTP AUTH, addresses that match those specified here 
will

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