Great, I'll follow that thread and provide advice if possible. The other user has linked another question which mentions what I was saying about "domain-wide delegation" for your service account. You'll need to do that in order to send mail from an address on a domain.
On Friday, June 24, 2016 at 5:06:09 PM UTC-4, Angel Sanchez wrote: > > Thanks. > > El viernes, 24 de junio de 2016, 15:34:05 (UTC-5), Nick (Cloud Platform > Support) escribió: >> >> Link to doc on domain-wide delegation >> <https://developers.google.com/identity/protocols/OAuth2ServiceAccount>. >> >> On Friday, June 24, 2016 at 4:10:32 PM UTC-4, Nick (Cloud Platform >> Support) wrote: >>> >>> Hey Angel, >>> >>> This forum is meant for high level discussion of the platform and >>> services rather than specific-issue technical support. A question like this >>> should be posted to Stack Overflow <http://stackoverflow.com>, where we >>> are also very active. You are likely to be in touch with a much larger >>> number of potentially-helpful users there. My advice from looking at the >>> code, to help either resolve the issue or improve your post to Stack >>> Overflow: >>> >>> 1. service is used but doesn't seem to be defined. Where is it defined? >>> Shouldn't you call the method on: >>> >>> Gmail gmail = new Gmail >>> .Builder(httpTransport, JSON_FACTORY, credential) >>> .setApplicationName(APPLICATION_NAME) >>> .build(); >>> >>> 2. Does your service account have domain-wide-delegation for the address >>> you're attempting to sending the mail from? "reason" : >>> "failedPrecondition" can sometimes mean this. >>> >>> Let me know if you have any questions, otherwise feel free to post the >>> link to your Stack question here once you've made it. I'll be happy to take >>> a look. This forum, as mentioned, can be used for more high level >>> architecture question and general advice on accomplishing specific >>> use-cases on the platform. >>> >>> Cheers, >>> >>> Nick >>> Cloud Platform Community Support >>> >>> On Friday, June 24, 2016 at 12:18:03 PM UTC-4, Angel Sanchez wrote: >>>> >>>> >>>> Trying to send email using the Gmail API into App Engine. Previously I >>>> created a Service account key into Credentials page, it generates a .P12 >>>> file which is in setServiceAccountPrivateKeyFromP12File parameter. It has >>>> a >>>> ID key joined to the account [email protected] into >>>> Service account page. The code: >>>> >>>> /* Application name. */ >>>> private static final String APPLICATION_NAME = "appnamefromappengine"; >>>> >>>> String emailAddress = "[email protected]"; >>>> JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance(); >>>> try { >>>> HttpTransport httpTransport = GoogleNetHttpTransport. >>>> newTrustedTransport(); >>>> >>>> Set<String> scopes = new HashSet<String>(); >>>> scopes.add(GmailScopes.GMAIL_SEND); >>>> scopes.add(GmailScopes.GMAIL_COMPOSE); >>>> scopes.add(GmailScopes.MAIL_GOOGLE_COM); >>>> scopes.add("https://www.googleapis.com/auth/admin.directory.user";); >>>> >>>> GoogleCredential credential = new GoogleCredential.Builder() >>>> .setTransport(httpTransport) >>>> .setJsonFactory(JSON_FACTORY) >>>> .setServiceAccountId(emailAddress) >>>> .setServiceAccountPrivateKeyFromP12File(new File( >>>> "/home/myuser/Test/src/main/webapp/resources/**somename**cd30e7118ad5.p12" >>>> )) >>>> .setServiceAccountScopes(scopes) >>>> .setServiceAccountUser("[email protected]") >>>> .build(); >>>> Gmail gmail = new Gmail >>>> .Builder(httpTransport, JSON_FACTORY, credential) >>>> .setApplicationName(APPLICATION_NAME) >>>> .build(); >>>> >>>> Properties props = new Properties(); >>>> Session session = Session.getDefaultInstance(props, null); >>>> MimeMessage message = new MimeMessage(session); >>>> message.setFrom(new InternetAddress("[email protected]")); >>>> message.addRecipient(javax.mail.Message.RecipientType.TO, new >>>> InternetAddress("[email protected]")); >>>> message.setSubject("Test Mail"); >>>> message.setText("Test Mail"); >>>> sendMessage(gmail, "[email protected]", message); >>>> >>>> Message message = createMessageWithEmail(email); //createMessageWithEmail >>>> function from Gmail API >>>> message = service.users().messages().send(userId, message).execute(); >>>> >>>> } catch (GeneralSecurityException e) { >>>> // TODO Auto-generated catch block >>>> e.printStackTrace(); >>>> } catch (IOException e) { >>>> // TODO Auto-generated catch block >>>> e.printStackTrace(); >>>> } catch (MessagingException e) { >>>> // TODO Auto-generated catch block >>>> e.printStackTrace(); >>>> } >>>> >>>> >>>> It returns me this error: >>>> >>>> >>>> com.google.api.client.googleapis.json.GoogleJsonResponseException: 400 >>>> Bad Request { "code" : 400, >>>> "errors" : [ { "domain" : "global", "message" : "Bad Request", >>>> "reason" : "failedPrecondition" } ], >>>> "message" : "Bad Request" } >>>> >>>> >>>> >>>> >>>> >>>> >>>> -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. 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