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How to change HELO hostname for outbound SMTP sessions?

oxident

Hi!

I'm facing a strange problem: My mailserver, which is behind an XG, recently get blocked by Cisco's SenderBase algorithm because it identifies itself with a wrong hostname when issuing the HELO/EHLO command. I've already confirmed that the mailserver does send the correct name ("HELO mail.mydomain.com") but Cisco told me, they were informed that my server sends a "HELO Sophos" instead!

That gave me a real bad reputation on their list and some SMTP server are already starting to refuse connections from my host.

It looks to me that the XG uses somekind of (transparent) outbound SMTP proxy which rewrites the commands my mailserver issues.

Is there any possibility to either deactivate this behaviour or, even better, to change the HELO hostname?

Thanks in advance...



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  • 0

    Come to aware that fix to this issue has taken in to the next SFOS version.

  • 0 in reply to SPandya

    When 15.01 MR-4 will be released? I have to route all outgoing mail through second gateway due to "HELO Sophos" bug, that is causing our domain blacklisted (Cisco SenderBase and SORBS). I don't want to test V16beta on production firewall now.

    Over 2 months of waiting to fix this critical issue and still no MR-4 :(

  • +1 in reply to LeszekMitura

    I was facing the same problem but finally fixed it, my mails are no longer bounced, they're delivered just fine.

     

     

    Solution: Go to Email >> General Settings >> SMTP Hostname [This will be used in HELO and SMTP greeting strings].

    In the Value of SMTP Hostname, put in your domain eg, XXXXX.com, XXXX.co.bk  [but not hostname of your mail server as that will cause a loop back given that your firewall is just acting as an SMTP Relay]

    I this reply is late but I hope it helps someone facing the same problem.

     

    Regards,

    andsjeff

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  • +1 in reply to LeszekMitura

    I was facing the same problem but finally fixed it, my mails are no longer bounced, they're delivered just fine.

     

     

    Solution: Go to Email >> General Settings >> SMTP Hostname [This will be used in HELO and SMTP greeting strings].

    In the Value of SMTP Hostname, put in your domain eg, XXXXX.com, XXXX.co.bk  [but not hostname of your mail server as that will cause a loop back given that your firewall is just acting as an SMTP Relay]

    I this reply is late but I hope it helps someone facing the same problem.

     

    Regards,

    andsjeff

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