I have a problem sending mail with JavaMail Service in GAE. I did all the code in the documentation, i debug it online and it work fine, and it count the mail sended in the quota section the problem is, i didn't receive anything, and also checked with the account sender and it's the same there isn't any trace of mail sended. I tried this for some mails address and it's not working too. Anyone had this problem yet? A solution to this?
The problem is that the mail sended as SPAM on gmail account. Read doc: https://cloud.google.com/appengine/docs/java/mail/#Java_Authenticating_mail_DKIM