[xwiki-users] Email Validation: stuck in 'prepare_success' status

Hello, The issue is that registration emails are not sent by XWiki, they get stuck in 'prepare_success' status (seen in "Administration: Mail Sending Status"). No errors. Even in MySQL 'mail_errorDescription' and 'mail_errorSummary' fields. Similar issue was asked some time ago <http://xwiki.475771.n2.nabble.com/Help-configuring-Email-Sending-for-User-verification-tp7599610p7599671.html> by another user but with no resolution. Some additional info: I have a fresh install of XWiki Enterprise 8.4.4 under Apache Tomcat 7.0.73 (Oracle Java 1.8.0_112-b15) with MySQL 5.5 under Debian Wheezy. Enterprise Flavor, no other addons or extensions were installed. I have set some internal logging to TRACE level while trying to understand the underlying reason. Filtered logging by 'mail' and enabled all 13 loggers. Still not that much useful info in logs. I am pretty sure that email is configured properly (I can send page as an email to myself using current SMTP setup and I receive it all right). Logs: Logs look different when user is registering: And that's it. These messages won't be sent, ever. 'Resend' button in admin panel does not help either. Please advise. Also I can change almost everything as this is my personal dedicated server, and I hope we can resolve this issue. -- View this message in context: http://xwiki.475771.n2.nabble.com/Email-Validation-stuck-in-prepare-success… Sent from the XWiki- Users mailing list archive at Nabble.com.