Re[2]: Re[2]: HELO не проверяется, либо я чего-то не понимаю

MG> Нет такой галочки.

MG> RFC2821, 4.1.4:
MG> ...
MG>     An SMTP server MAY verify that the domain name parameter in the EHLO
MG>     command actually corresponds to the IP address of the client.
MG>     However, the server MUST NOT refuse to accept a message for this
MG>     reason if the verification fails: the information about verification
MG>     failure is for logging and tracing only.


      Можно просто проверять HELO and Return Paths for:everybody
      Settings - SMTP - Receiving

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С уважением,
 avp                          mailto:avp@kpsb.ru