[CentOS] question on sending mail with 5.2
ra+centos at br-online.de
Sat Sep 13 09:50:28 UTC 2008
Luke S Crawford wrote:
> considering just how many people use greylisting, this is likely a
> bad idea. Greylisting works by rejecting the first message from a new
> server with a 4xx (temporary) error code. If the server tries again
> immediately or never tries again, it's probably a spammer. If the server
> waits a reasonable period of time (say, 30 minutes) and then re-sends the
> mail, it's probably legit, and the greylist program puts that server on the
> whitelist so mail from that server goes through right away next time.
> Many people set things up such that if you try again immediately, you get
> put on a blacklist, as you are probably a spammer.
I really don't understand why people just don't turn off their mailservers if they
don't want mail from others.
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