[Mimedefang] Re: Stopping bogus Domain in HELO (James Ebright)

[Dirk the Daring]

>From: "James Ebright" <jebright at esisnet.com>
>
>On Mon, 20 Jun 2005 12:50:59 -0400 (EDT), Dirk the Daring wrote
>
>>    "lh" is an obviously fake hostname. How would I go about
>> requiring a HELO, if an IP address in brackets is not given, to have
>> a resolvable FQDN?
>
>The problem with blocking on this is you will end up blocking alot of
>legitimate email as well, some MTAs and most MUAs send pretty much whatever
>they feel like for a helo string. One very popular one uses the username as
>the helo string......

   Well, this is a relay server. No MUAs should be talking to it
directly, so it doesn't matter if popular MUAs are this stupid, they
shouldn't be talking to this server in the first place.

   As for MTAs that are this stupid.... hmmmm. Which ones?

Dirk