Munir Nassar writes:
> too lazy to check the exact RFC at this moment, but basically it
> states that the sending mailserver has to have an MX record, that is
> it has to be a mailserver.

You should check RFC 2821, because it says no such thing.

> Another thing that the recipient
> mailserver should check for is the domain sent with the helo/ehlo
> command, many sendmail installations simply send localhost, which is
> invalid according to the RFC, and should also be rejected.

RFC 2821 section 3.6 states that the name given must be a primary host name
or an address literal.  Section 4.1.4 states that the server may verify the
name given, but must not refuse to accept a message because the verification
failed.

-- 
David Phillips <david at acz.org>
http://david.acz.org/


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