XF 1.5 What is this error referring to?

[gavpeds]

I got this error, is this something to do with bounce email log?

Zend_Mail_Protocol_Exception: Email to removed@gmail.com failed: Incorrect authentication data - library/Zend/Mail/Protocol/Abstract.php:431
Generated By: Unknown Account, 16 minutes ago
Stack Trace
#0 /home/window/public_html/library/Zend/Mail/Protocol/Smtp/Auth/Login.php(95): Zend_Mail_Protocol_Abstract->_expect(235)
#1 /home/window/public_html/library/Zend/Mail/Protocol/Smtp.php(217): Zend_Mail_Protocol_Smtp_Auth_Login->auth()
#2 /home/window/public_html/library/Zend/Mail/Transport/Smtp.php(217): Zend_Mail_Protocol_Smtp->helo('localhost')
#3 /home/window/public_html/library/Zend/Mail/Transport/Abstract.php(348): Zend_Mail_Transport_Smtp->_sendMail()
#4 /home/window/public_html/library/Zend/Mail.php(1194): Zend_Mail_Transport_Abstract->send(Object(Zend_Mail))
#5 /home/window/public_html/library/XenForo/Mail.php(175): Zend_Mail->send(Object(Zend_Mail_Transport_Smtp))
#6 /home/window/public_html/library/XenForo/Mail.php(152): XenForo_Mail->sendMail(Object(Zend_Mail))
#7 /home/window/public_html/library/XenForo/Model/UserConfirmation.php(153): XenForo_Mail->send('removed@gmail.co...', 'levana')
#8 /home/window/public_html/mobiquo/lib/TTForum.php(300): XenForo_Model_UserConfirmation->sendEmailConfirmation(Array)
#9 /home/window/public_html/mobiquo/lib/classTTSSO.php(120): TTForum->createUserHandle('removed@gmail.co...', 'levana', 'No69rCjv', false, Array, Array, Array)
#10 /home/window/public_html/mobiquo/lib/classTTSSO.php(86): TTSSOBase->createUser('removed@gmail.co...', 'levana', '123321', Array, false)
#11 /home/window/public_html/mobiquo/include/sign_in.php(23): TTSSOBase->signIn(Array)
#12 [internal function]: sign_in_func(Object(xmlrpcmsg))
#13 /home/window/public_html/mobiquo/lib/xmlrpcs.inc(1038): call_user_func('sign_in_func', Object(xmlrpcmsg))
#14 /home/window/public_html/mobiquo/lib/xmlrpcs.inc(951): xmlrpc_server->execute(Object(xmlrpcmsg))
#15 /home/window/public_html/library/Tapatalk/xmlrpcs.php(36): xmlrpc_server->parseRequest('\r\n<methodCall>\r...', 'US-ASCII')
#16 /home/window/public_html/mobiquo/mobiquo.php(166): Tapatalk_xmlrpcs->service()
#17 {main}
Request State
array(3) {
["url"] => string(53) "http://windowcleaningforums.co.uk/mobiquo/mobiquo.php"
["_GET"] => array(0) {
}
["_POST"] => array(0) {
}
}

 

[Mike]

It's unrelated to email bounces. It's saying that mail failed to send, likely because your SMTP username/password are incorrect (or the server rejected them for whatever reason).

 

[gavpeds]

Must be something else then as im using mandrill smtp settings but other emails seem to be working fine.

 

[Mike]

It may have been a temporary glitch, but it's the SMTP server returning an error (or an unexpected response at least).

 

[gavpeds]

Ah yes it was. I just moved servers and had to disable smtp restrictions on the new server.,