Внятно написано:
A message that you sent could not be delivered to one or more of itsrecipients. This is a permanent error. The following address(es) failed:
wwwseversk@tomsk.ruSMTP error from remote mail server after RCPT TO:<
wwwseversk@tomsk.ru>:host mail.tomsk.ru [77.106.95.186]: 550 5.1.1 <
wwwseversk@tomsk.ru>:Recipient address rejected: User unknown in virtual mailbox table
что означает - что такого ящика, куда вы отправляете почту не найдено
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
wwwseversk@tomsk.ru
SMTP error from remote mail server after RCPT TO:<wwwseversk@tomsk.ru>:
host mail.tomsk.ru [77.106.95.186]: 550 5.1.1 <wwwseversk@tomsk.ru>:
Recipient address rejected: User unknown in virtual mailbox table
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