Sending Mass Email is no longer working

[Daphonic]

I normaly send out a Monthly Mass Email for updates and info for our Community, but now its only sending it out to maybe 100 people.

This is the Error Log on one of them.

Spoiler: ERROR LOG

ErrorException: Email to REDACTED failed: fwrite(): SSL operation failed with code 1. OpenSSL Error messages: error:140D00CF:SSL routines:SSL_writerotocol is shutdown - library/Zend/Mail/Protocol/Abstract.php:324
Generated By: Daphonic, 31 minutes ago
Stack Trace
#0 [internal function]: XenForo_Application::handlePhpError(2, 'fwrite(): SSL o...', '/home/lethality...', 324, Array)
#1 /home/lethality/lethalitygaming/library/Zend/Mail/Protocol/Abstract.php(324): fwrite(Resource id #112, 'RSET\r\n')
#2 /home/lethality/lethalitygaming/library/Zend/Mail/Protocol/Smtp.php(338): Zend_Mail_Protocol_Abstract->_send('RSET')
#3 /home/lethality/lethalitygaming/library/Zend/Mail/Transport/Smtp.php(203): Zend_Mail_Protocol_Smtp->rset()
#4 /home/lethality/lethalitygaming/library/Zend/Mail/Transport/Abstract.php(348): Zend_Mail_Transport_Smtp->_sendMail()
#5 /home/lethality/lethalitygaming/library/Zend/Mail.php(1194): Zend_Mail_Transport_Abstract->send(Object(Zend_Mail))
#6 /home/lethality/lethalitygaming/library/XenForo/ControllerAdmin/User.php(1145): Zend_Mail->send(Object(Zend_Mail_Transport_Smtp))
#7 /home/lethality/lethalitygaming/library/XenForo/ControllerAdmin/User.php(1050): XenForo_ControllerAdmin_User->_sendEmail(Array, Array, Object(Zend_Mail_Transport_Smtp))
#8 /home/lethality/lethalitygaming/library/XenForo/FrontController.php(347): XenForo_ControllerAdmin_User->actionEmailSend()
#9 /home/lethality/lethalitygaming/library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#10 /home/lethality/lethalitygaming/admin.php(13): XenForo_FrontController->run()
#11 {main}

 

[Mike]

This is generally an issue with the connection to your SMTP server. It indicates that the connection to the server was closed unexpectedly (https://edoceo.com/notabene/openssl-error-140d00cf).

In general, this is one of the reasons we recommend using the built-in PHP mail system if at all possible as it generally handles queuing and deferral itself.