mouss wrote:
Francesco Abeni wrote:
Good morning everyone, i'm in charge of reducing SPAM at a customer
site. Already have SPAMASSASSIN, sa-update weeklyexecuted.
I'd like to implement a "Bogus MX" for further filtering of SPAM. I
don't know if this is the correct name, by "Bogus MX" i mean setting
up a low priority MX record which points at a non-smtp server.
http://nolisting.org/
I'd like to know some first-hand experience about two questions.
1. Has it caused any lost mail issue or client complaints?
I know every half decent mail server should try other MX. In real
life, have you often received complaints from valid senders?
2. Has it reduced significantly SPAM?
I'd like to know if it's worth the (little) trouble of setup and
verifying question #1.
We do something like nolisting. You will lose legit mail no matter which
trick you use. So it's best if you have a method of fixing that. Our
first mx record is a real smtp server, it's just firewalled off to most
of the world. It's used as a fast lane for our internal networks so they
aren't slowed down by spam attacks. If we run into a legit server having
issues (and there will be, don't let anyone else fool you into thinking
there won't be), we can just open up the firewall to their SMTP and
problem is solved.
Richard
