this is what i saw in system log :

IPS\Email\Incoming\PopImapException::0

pop3_login_err

BACKTRACE

#0 /var/www/mydomain.com/public_html/v1/applications/core/tasks/pop.php(50): IPS\Email\Incoming\_PopImap->__construct()
#1 /var/www/mydomain.com/public_html/v1/system/Task/Task.php(281): IPS\core\tasks\_pop->execute()
#2 /var/www/mydomain.com/public_html/v1/system/Task/Task.php(244): IPS\_Task->run()
#3 /var/www/mydomain.com/public_html/v1/applications/core/interface/task/task.php(72): IPS\_Task->runAndLog()
#4 {main}

Edited 7 мартаMar 7 by Belon

It appears that there was a problem logging into the POP3 server to fetch incoming emails.
To fix this, you should review and confirm the settings for the POP3 email account. This includes verifying the username, password, server address, and port number.
Make sure these settings are accurate and properly configured to enable successful access to the email account.