XF 1.2 Server Error: Zend_Mail_Protocol_Exception: Incorrect authentication data

[Live Free]

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):

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]

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

 

[Live Free]

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

How do I do that? I don't see an option in the main config.php file.

 

[Amaury]

How do I do that? I don't see an option in the main config.php file.

See if this helps.

 

[Jeremy]

Are you using SMTP?

 

[Mike]

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]

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]

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.)