Re: Postfix - ehlo..

[Marek Olejniczak <marek@olmar.poznan.pl>]

On Wed, 14 Feb 2007, Jacek Politowski wrote:

> Tak w ogóle, jeśli pamięć mnie nie myli, odrzucanie HELO/EHLO jest
> niezgodne z RFC.
>
> Żadne RFC nie wymaga też posiadania revDNSu i przedstawiania się FQDN
> w EHLO - można używać IP.

Wymaga przedstawiania się FQDN w EHLO/HELO:

http://www.rfc-ignorant.org/rfcs/rfc2821.php

      The domain name given in the EHLO command MUST BE either a primary
      host name (a domain name that resolves to an A RR) or, if the host
      has no name, an address literal as described in section 4.1.1.1.

Ponadto warto zobaczyć np. dyskuję na ten temat:

http://www.irbs.net/internet/postfix/0602/1316.html


oraz tu:

http://www.irbs.net/internet/postfix/0602/1361.html

	Also RFC 1123 (section 5.2.5).
     	5.2.5 HELO Command: RFC-821 Section 3.5

         The sender-SMTP MUST ensure that the <domain> parameter in a
         HELO command is a valid principal host domain name for the
         client host. As a result, the receiver-SMTP will not have to
         perform MX resolution on this name in order to validate the
         HELO parameter.


         The HELO receiver MAY verify that the HELO parameter really
         corresponds to the IP address of the sender. However, the
         receiver MUST NOT refuse to accept a message, even if the
         sender's HELO command fails verification.


Pozdr.

M.