> I was thinking the exact same thing.
>
> A number of our customers use the ability to customize their SMTP
> banner via our products in order to avoid some very basic system
> identification by spammers (Cisco PIX does this too for instance, but
> in a very broken and disruptive way). It wouldn't escape detailed
> analysis, but if a spammer can't casually discover what type of anti-
> spam system they're connecting to, they're less likely to attempt any
> work-arounds.
>
> In the case of a greylisting type of solution, it seems that
> identification would be especially devastating since the work-around
> is so trivial. Unless my understanding is very wrong, the whole
> effectiveness of the solution depends on the spammers not realizing
> the difference between a "normal" MTA and one that greylists.
>
No, in my experience it's the opposite. I change my sendmail
banners to look like spamd. the simplistic spammers see that and
disconnect.
Which suits me fine.
-Bob
