Hi, On Wed, Jun 12, 2013 at 2:54 PM, Daniel McDonald <dan.mcdon...@austinenergy.com> wrote: > On 6/12/13 1:25 PM, "Alex" <mysqlstud...@gmail.com> wrote: > >> John Hardin wrote: >>> As was suggested earlier: greylisting? >> >> I really don't think my users would tolerate the delay, so I've never >> implemented it. They would have vendors calling them on the phone >> complaining, not to mention users. From what I understand the delay >> can be multiple minutes, correct? > > Yes, but only for the first message. Once you've proved that they are a > real mail-server greylisting is pretty pointless.
I'm thinking this is sounding like a better option. The IPs change way too quickly for me to be able to keep up with updating a DNSBL. It's funny -- despite all MXs having the same weight, mail03 is really the one that's pounded with these pump-and-dump spams. Maybe I'll start with implementing greylisting there. Thanks again, Alex
