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Accepted
Shirker
Asked: 2014-11-19 11:11:21 +0800 CST

Howto masquerade Postfix on SMTP session?

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for security reason (and for other reasons too) I want to hide "Postfix" from SMTP response

now:

[root@mail ~]# telnet 127.0.0.1 25
    Trying 127.0.0.1...
    Connected to 127.0.0.1.
    Escape character is '^]'.
    220 mail.example.biz ESMTP Postfix

I need the answer to be only:

220 mail.example.biz ESMTP

Is this possible?

postfix

1 Answers

  1. Best Answer

    Change smtpd_banner. Note that per protocol, $myhostname must be the first argument.

    smtpd_banner = $myhostname ESMTP random mail server bent over and ready.
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