Re: [Asrg] host named "mail" that is not an MX

[der Mouse <mouse at Rodents.Montreal.QC.CA>]

["william(at)elan.net" <william at elan.net>]
> P.S. This also gives an interesting anti-spam option to check, i.e.
> purposely change MX to another name/ip and set old server to run
> daemon that accepts mail but really sends it all to /dev/null.

$DAYJOB has something similar in place right now: the no-longer-valid
MX accepts mail and, when addressed somewhere valid, sends it on - but
it logs a copy of *all* mail, even mail addressed to totally bogus
addresses.  (It wasn't done as an anti-spam measure, or it would be
devnulling all the mail....)

[Markus Stumpf <maex-lists-spam-ietf-asrg at Space.Net>]
> But I have always wondered why e.g. mail.space.net is spammed with
> mails for @space.net even if it is not in the MX list.  This is not
> because of stale DNS entries (the MX has never been there).

Okay, I've just set myself up to test this theory.  I found a domain I
run the mailer for, one that has never had a host named "mail".  I
created a "mail" name for one of the hosts and set up a simple
log-everything SMTP daemon on it.  We'll see what happens.

Hmm, I wonder what would happen if I border-router-blocked any host
sending mail to that host?

/~\ The ASCII				der Mouse
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