My advice is to drop almost all RBL for REJECTING
email and use them STRICTLY for "Greylisting" email.
I've considered this.
The only concern I have is that a small percentage of our users opt to
use SPAM filtering, most do not, and a large percentage of users are the
type that have mailboxes and never check them - so they turn into SPAM
receptacles just collecting up to 60 days of SPAM for us to back up and
maintain.
I've considered disabling all black lists that add sites for sending
SPAM and only using the open proxies, open SOCKS, open relay RBLs. I
figure most legitimate blocked mail comes from places (like
hotmail/myway.com/yahoo/gmail/excite which cause the most problems with
our users and blacklisting) that are at least competent enough to not
fall in those categories.
Steve
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