Author: Jim Roberts Date: To: Marc Perkel CC: Exim Users Mailing List Subject: Re: [exim] Re: Thoughts on Open Relays
----- Original Message -----
From: "Marc Perkel" <marc@???> >
> The only reason people got aaway from open relays is bacause of the
> spammers. But if I solve that problem then why not?
>
Err... Many good reasons have already been posted, having nothing to do
with spam. But I'll toss one more log on the fire, what the heck.
The very most effective first line defense, against any misuse of email
service, is blocking open relaying. If someone tries to relay without
authenticating first, then 100% of the time, with zero false positives, they
should be blocked. It's easy, consumes no additional resources (already
have to check if the addressee is local anyway), is extremely effective
(100% accuracy), saves bandwidth (reject before data), and imposes zero cost
on innocent 3rd parties (in fact, helps out innocent 3rd parties). And...
I don't have to run ANY of those messages through SA or any other
resource-consuming anti-spam test! (Works even better than the "penalty
box" idea... heh heh)
Now, give even one good reason why anyone should NOT use such an incredibly
cheap and effective tool?
