Milter-greylist

On Sun, 4 Nov 2018, Fred Smith fredex@... [milter-greylist] wrote:

> I've been using milter-greylist for a couple of years, with a huge
> reduction in spam.
>
> the past week or so I've had a huge increase, and looking at
> /var/log/maillog I can see that one of the main culprits is being
> auto-whitelisted! Also:

Recently I have found it necessary to explicitly blacklist blocks of 
IP addresses which are used by spam factories and use mailers which 
just don't give up so they are eventually white-listed.  For some 
reason these IP addresses have not found their way into DNS 
blacklists.  After I blacklisted the blocks of IP addresses, the 
amount of spam getting through dropped dramatically.

By sorting greylist.db, I see that many more blocks of IP addresses 
now need to be added to the blacklist.

Bob
-- 
Bob Friesenhahn
bfriesen@..., http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/