Re: More sorbs blacklisting
On Mon, 19 Jun 2006 15:42:40 -0600, Michael Loftis
>I'll second that. We've taken to 4XX (tempfail) on unknown client during
>the day when our mail loads are high.
I also check matching forward/reverse DNS. That stops even more.
>I can't leave it on all day because too many clueless net/mail admins
>sending legitimate mail (20-30% i estimate) also don't have valid rDNS.
I never turn it off. I'll gladly sacrifice 20% of "legit" mail to
stop 99.5% of all SPAM. With my DNS checks, and five blacklists, it's
working very well.
Why worry about missing "legit" mail? I already get more than I need
If everybody would get tough, like me, the clueless admins might get a