XF 2.1 Bounce connection error: last request failed

[LawdBeerus]

I'm trying to set up bounced email handling with Gmail, but get these errors sometimes. What's wrong?

Zend\Mail\Protocol\Exception\RuntimeException: Bounce connection error: last request failed src/vendor/zendframework/zend-mail/src/Protocol/Pop3.php:166
Generated by: Unknown account Mar 2, 2019 at 5:53 PM
Stack trace
#0 src/vendor/zendframework/zend-mail/src/Protocol/Pop3.php(104): Zend\Mail\Protocol\Pop3->readResponse()
#1 src/vendor/zendframework/zend-mail/src/Storage/Pop3.php(148): Zend\Mail\Protocol\Pop3->connect('ssl://imap.gmai...', 993, 'ssl')
#2 src/XF/EmailBounce/Processor.php(237): Zend\Mail\Storage\Pop3->__construct(Object(stdClass))
#3 src/XF/SubContainer/Bounce.php(15): XF\EmailBounce\Processor::getDefaultBounceHandlerStorage(Object(XF\Pub\App))
#4 src/XF/Container.php(28): XF\SubContainer\Bounce->XF\SubContainer\{closure}(Object(XF\Container))
#5 src/XF/SubContainer/Bounce.php(43): XF\Container->offsetGet('storage')
#6 src/XF/Job/EmailBounce.php(20): XF\SubContainer\Bounce->storage()
#7 src/XF/Job/Manager.php(253): XF\Job\EmailBounce->run(G)
#8 src/XF/Job/Manager.php(195): XF\Job\Manager->runJobInternal(Array, G)
#9 src/XF/Job/Manager.php(79): XF\Job\Manager->runJobEntry(Array, G)
#10 job.php(42): XF\Job\Manager->runQueue(false, 8)
#11 {main}

 

[KSA]

This keeps popping up every 10 min, not sure what is causing it.

 

[Mike]

If it's happening consistently, it's an issue with the details you've used to setup your bounce handler connection. If you're 100% sure they're correct, then there may be something on your server which is intercepting the connection (not uncommon with some shared hosts) or there's an issue with the IMAP/POP3 provider. If this was working before and nothing knowingly changed on your server, the latter may be the cause (though it's hard to be definitive).

 

[KSA]

If it's happening consistently, it's an issue with the details you've used to setup your bounce handler connection.

I for a reason instead of punching in the incoming email details, I put the outgoing email details and yet running around complaining about it.