Milter-greylist

> I'm almost shure that some spammers send a number of
> spammails with
> the same sender to the same list of recipients. The first
> mail get
> greylisted and never comes through, but the second and
> every mail
> after that gets autowhitelisted.
> 
> I don't really know what to do about this. 

one thing is to decrease the grey time. i think the default
is something like 3d. when i set mine to 16h the people who
send stuff out daily get foiled.

> I had an idea of letting Spamassassin check the mails and
> remove any
> entry from the whitelist if it was spam.
> Disable auto-whitelisting is another suggestion.
> There was a discussion about dark-greylisting I didn't
> quite
> understand that pionts to the same direction.
> 

i use milter-greylist in concert with other milters
allowing greylist to be the first line of defense. for me
this works pretty well, but i have to resort to rbl's

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