Matthias Haegele schrieb:
(...)
BTW, has anyone a regexp ready to accept all names that might be real
smtp-out servers?
(such as mail|smtp|mx|email and so on)
I think it can be useful for example to whitelist them before greylisting.
I think this is rather a bad idea. I would prefer to treat them on their
behaviour
(use helo checks, check for reverse dns ..., you should find several
examples in this thread, from mouss ...) .
What would prevent a spammer to name his box "smtp" e.g.?
Spammers often use "hijacked" machines (infected etc.). As such, they
can't simply change the reverse DNS for that machine's IP address.
--
Tomasz Chmielewski
http://wpkg.org
