I looked for any discussion lists about greylisting and haven't found any, so I thought I might try asking here.
I'm considering adding greylisting to my postfix configuration, and some of the articles I have been reading about greylisting show that there can be any of several situations in which greylisting would not be a viable solution.
In particular they mention issues with how some MTAs break something in the RFC that makes greylisting work, and how receiving mail from a site which uses multiple relay hosts (each with a different address) can also cause mail to not be delivered.
So I thought I would ask on the list to see if anyone has done much with greylisting and found it to be good or bad.
I installed milter-greylist-1.6. It got rid of 95% of my SPAM email.
I went from 300-400 messages a day to 2-3. And those are coming in through my fetchmail account, so there's not much I can do about it.
I rely on Spamassassin and the Bayesian filters in Thunderbird to get rid of most of those.
I liked greylist-1.6 so much that I made an FC2 RPM (and SRPM) for it (from the 1.4 SRPM and the 1.6 tarball). It is available here:
http://kjchome.homeip.net:81/milter-greylist-1.6-0.i386.rpm http://kjchome.homeip.net:81/milter-greylist-1.6-0.src.rpm
I do also use the DNSBL lists, and some of my accounts also use TMDA. What I am hoping for is that with greylisting, I can further reduce the amount of spam mail traffic.
I started by using SPAMHAUS blocking in sendmail. Then I installed Spamassassin (as a procmail filter to flag SPAM), and then I added the SPF-milter. None of these made dent like milter-greylist did!
I'm still running all four, and a much happier camper now.
-- Kevin J. Cummings kjchome@xxxxxxx cummings@xxxxxxxxxxxxxxxxxx cummings@xxxxxxxxxxxxxxxxxxxxxxx
