From: Jorey Bump (no email)
Date: Sat Sep 17 2005 - 20:59:54 EDT
Ralf Hildebrandt wrote:
> But I gave it a though while being away: Why not habe two MX records:
> * one real record
> * one with lower priority that points to a host that has NO smtp service
I outlined my experience with this in August in a thread titled "Poor
Man's Greylisting". I've been doing it for over a year, with no false
positives that wouldn't have been rejected by other means. The best
thing is that it reduces the load on Postfix, which never sees the
messages. It's also an effective solution to direct-to-MX spam, if you
don't require a real backup MX.
If anyone else has tried out this technique, I'd be interested to hear
of the results, especially on large sites.