On 25.10.18 08:11, Poliman - Serwis wrote:
Hi. I heard that having a non-functional server as the primary MX is a
well-known trick to reduce the amount of incoming spam, as most software
used by spammers will only ever try the highest-priority MX. How to do this?
it will also delay the mail delivery, sometimes very much.
btw, many spamers use (or at least used to) connectto lowest-priority MX.
Having unreachable lowest priority MX could help more here.
However, postscreen can do this even better by using
postscreen_whitelist_interfaces, see
http://www.postfix.org/POSTSCREEN_README.html#white_veto
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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One OS to rule them all, One OS to find them,
One OS to bring them all and into darkness bind them
