Milter-greylist

Oliver Fromme wrote:
>
> Personally, I tend to prefer false negatives over false
> positives.  After all, greylisting is not the only measure
> against spam, and if something gets through, the next
> stage filter (e.g. content-based or whatever) can take
> care of it.  YMMV, of course.
>
>   

That was my thinking when I set mine spam stuff up years ago and found
out about greylisting. My set up is:

Pregreet, sendmail.mc setting to get rid of ratware programs running on
botnets.
greylist, selfexplaining here. ;-)
clamav, milter-calmav to take care of the viris and phising mails.
spamassassasn, milter-spamassassan takes care of the ones that slip
through and is the last due to most resource one of them all and is set
up to flag/tag SPAM in the subject line only. And reject for very high
scoreing ones.

This setup has no false positves except for spammassassan and it can
only tag it with SPAM and send it on its way. If there is a technicial
glitch or whatever and letgit mail gets rejected, the sender ACTUALLY
gets an error message and not to /dev/null. So the sender can use
another channel, such as IM, IRC, phone, etc. to alert the sysdem admin
of a problem.

Its a lot easer to whitlist problem servers then to blacklist all the
spammer servers out there.

--Techwolf.