XF 1.2 Server Error: Zend_Mail_Protocol_Exception: Incorrect authentication data

Live Free

Active member
Recieving many of these in the past few days. Possibly tied into the random server errors my members are seeing when trying post/PM/post images (prevents them from doing so):

Code:
Error Info
Zend_Mail_Protocol_Exception: Incorrect authentication data - library/Zend/Mail/Protocol/Abstract.php:431
Generated By: Unknown Account, 34 minutes ago
Stack Trace
#0 /home/admin/public_html/library/Zend/Mail/Protocol/Smtp/Auth/Login.php(95): Zend_Mail_Protocol_Abstract->_expect(235)
#1 /home/admin/public_html/library/Zend/Mail/Protocol/Smtp.php(217): Zend_Mail_Protocol_Smtp_Auth_Login->auth()
#2 /home/admin/public_html/library/Zend/Mail/Transport/Smtp.php(200): Zend_Mail_Protocol_Smtp->helo('localhost')
#3 /home/admin/public_html/library/Zend/Mail/Transport/Abstract.php(348): Zend_Mail_Transport_Smtp->_sendMail()
#4 /home/admin/public_html/library/Zend/Mail.php(1194): Zend_Mail_Transport_Abstract->send(Object(Zend_Mail))
#5 /home/admin/public_html/library/XenForo/Model/MailQueue.php(62): Zend_Mail->send(Object(Zend_Mail_Transport_Smtp))
#6 /home/admin/public_html/library/XenForo/Deferred/MailQueue.php(10): XenForo_Model_MailQueue->runMailQueue(9.99999690056)
#7 /home/admin/public_html/library/XenForo/Model/Deferred.php(198): XenForo_Deferred_MailQueue->execute(Array, Array, 9.99999690056, '')
#8 /home/admin/public_html/library/XenForo/Model/Deferred.php(321): XenForo_Model_Deferred->runDeferred(Array, 9.99999690056, '', false)
#9 /home/admin/public_html/library/XenForo/Model/Deferred.php(274): XenForo_Model_Deferred->_runInternal(Array, NULL, '', false)
#10 /home/admin/public_html/deferred.php(18): XenForo_Model_Deferred->run(false)
#11 {main}
Request State
array(3) {
["url"] => string(41) "http://www.site.org/deferred.php"
["_GET"] => array(0) {
}
["_POST"] => array(4) {
["_xfRequestUri"] => string(49) "/threads/starfall-discussion-thread.63750/page-14"
["_xfNoRedirect"] => string(1) "1"
["_xfToken"] => string(8) "********"
["_xfResponseType"] => string(4) "json"
}
}
 

Amaury

Well-known member
Try disabling your resources (if you have any) via config.php and see if the problem persists.
 

Mike

XenForo developer
Staff member
That just indicates that your SMTP connection info isn't right. Likely the username and password, though I would double check everything. If you're not sure, check with your SMTP provider.
 

Live Free

Active member
I am using SMTP, and I've doubled checked the info and it's correct. I haven't had this error until recently, and I've also been receiving emails properly (PM notifications). I just sent a test PM and got an instant email alert.
 

Mike

XenForo developer
Staff member
If it's sporadic, that is likely indicative of an issue with the SMTP server itself. Not a lot you can do if you don't operate the SMTP server. (One of the reasons we generally recommend the standard PHP mail options over third-party SMTP servers.)
 
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