We do not have encryption set on the SMTP settings
We are seeing the
Zend_Mail_Protocol_Exception: Email to _______@__________.com failed: Incorrect authentication data - library/Zend/Mail/Protocol/Abstract.php:431
The Conversation emails are getting sent correctly somehow.
We have checked throughly the mandrill details and tried using ssl and tls with varying ports.
The fact that Conversation emails send properly through mandrill but anything else fails makes us believe the problem may be with Xenforo
Has anyone else seen this recently? Any ideas on how to fix?