postfix-users October 2010 archive
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postfix-users: Re: rejecting clients greeting me with my own nam

Re: rejecting clients greeting me with my own name

From: Wietse Venema <wietse_at_nospam>
Date: Mon Oct 04 2010 - 18:48:14 GMT
To: Postfix users <postfix-users@postfix.org>

Ralf Hildebrandt:
> > With YOUR IP ? That's highly unlikely, to the point of unbelievability.
>
> I've seen those as well; not from within my networks, but yes. I've
> seen them!

I see that all the time.

For me, blocking helo with with $inet_interfaces/$myhostname is
not sufficient, since Postfix does not know everything.

More useful is to block any helo name/address that resolves to an
address on the local network when the client is elsewhere, but
that is not as simple as suggested in this thread.

        Wietse