XF 2.1 Unsubscribe connection error: cannot login, user or password wrong

[KSA]

Getting this error and it is driving me crazy when everything else works except the unsubscribe mail handler.

I am using one email account for all.

Zend\Mail\Storage\Exception\RuntimeException: Unsubscribe connection error: cannot login, user or password wrong
src/vendor/zendframework/zend-mail/src/Storage/Imap.php:217
Generated by: Unknown account
Jul 28, 2020 at 4:13 PM
Stack trace
#0 src/XF/EmailUnsubscribe/Processor.php(142): Zend\Mail\Storage\Imap->__construct(Object(stdClass))
#1 src/XF/SubContainer/Unsubscribe.php(15): XF\EmailUnsubscribe\Processor::getDefaultUnsubscribeHandlerStorage(Object(XF\Pub\App))
#2 src/XF/Container.php(28): XF\SubContainer\Unsubscribe->XF\SubContainer\{closure}(Object(XF\Container))
#3 src/XF/SubContainer/Unsubscribe.php(33): XF\Container->offsetGet('storage')
#4 src/XF/Job/EmailUnsubscribe.php(20): XF\SubContainer\Unsubscribe->storage()
#5 src/XF/Job/Manager.php(253): XF\Job\EmailUnsubscribe->run(G)
#6 src/XF/Job/Manager.php(195): XF\Job\Manager->runJobInternal(Array, G)
#7 src/XF/Job/Manager.php(79): XF\Job\Manager->runJobEntry(Array, G)
#8 job.php(42): XF\Job\Manager->runQueue(false, 8)
#9 {main}