David Sánchez Martín wrote:
You asked for opinions, and this is mine.
Of course, I asked for opinions, specially because
I used not to be a big fan of graylisting.
Giving that spamdyke uses a slightly different approach to
Graylisting to that I knew, I thought it could be
interesting.
I hopefully give it a try.
Regards.
;) It should be obvious that I'm not a big fan.I've always greylisted by
IP - after the third successful delivery after greylisting the IPs are
allowed for 48 hours. If they do not send anything in 48 hours, they are
greylisted again. If they do, the 48 timer resets.
The biggest killer for spam for me is rDNS checking. I'm thinking about
making it default in the next version of QMT (version 2.x) - I'll run a
poll beforehand first to make sure it's what the community wants.
Make sure to report back your results though. I'd be curious as to how
much it decreases spam in your environment. Provide some metrics as well
(number of domains, users, emails per day, etc.)
