Milter-greylist

On Sun, Nov 04, 2018 at 05:09:41PM -0600, Bob Friesenhahn bfriesen@... [milter-greylist] wrote:
> 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.

might they be forged/spoofed addresses, such that the mail is not actually
from those addresses? If so blacklisting blocks of them may be blocking
innocent bystanders. So to speak.

Fred
-- 
---- Fred Smith -- fredex@... -----------------------------
                    The Lord detests the way of the wicked 
                  but he loves those who pursue righteousness.
----------------------------- Proverbs 15:9 (niv) -----------------------------