Zend_Mail_Protocol_Exception: cannot connect to host; error = (errno = 0 )

Сабж:
Информация об ошибке
Zend_Mail_Protocol_Exception: cannot connect to host; error = (errno = 0 ) - library/Zend/Mail/Protocol/Imap.php:100
Сгенерирована пользователем: Неизвестная учётная запись, Вчера, в 18:11
Трассировка стэка
#0 /var/www/***/data/www/***/library/Zend/Mail/Storage/Imap.php(273): Zend_Mail_Protocol_Imap->connect('imap.mail.ru', 993, 'SSL')
#1 /var/www/***/data/www/***/library/XenForo/Model/EmailBounce.php(292): Zend_Mail_Storage_Imap->__construct(Array)...

Zend_Mail_Protocol_Exception: cannot connect to host; error = (errno = 0 ) Zend_Mail_Protocol_Exception: cannot connect to host; error = (errno = 0 )