XF 1.5 New server emailing connection timed out


Active member
So I just migrated my sites to a new server but I'm getting alot of these errors in "server errors":

Zend_Mail_Protocol_Exception: Email to xxxx@xxxx.com failed (after retry): Connection timed out - library/Zend/Mail/Protocol/Abstract.php:277

I tried registering to see if any emails were getting sent and they do, but it did take 1 retry aswell.

Anyone know what maybe causing this?