On Sun, 13 Jan 2008, Alessandro Vesely wrote:
I've ended up making a blanket rule - no forwarding to AOL. Ever. For
any reason - enforced by checking for aol.com in the MAIL TO for forwarded
messages by the outgoing mail milter.
Obviously, senders want to maximize the chances that what they send gets
delivered. However, I hadn't thought that one would sacrifice forwarding
to specific domains in order to maximize the sum of its delivery chances.
As an alternative, you may register a domain that you only use for SPF-
compliant forwarding of unfiltered mail. That domain will end up having
the reputation it deserves, i.e. some average of the global spam traffic.
To let recipients make a better classification, you may opt to do vanilla
forwarding for senders that either lack any SPF policy or authorize your
IP explicitly --to achieve the same effect w.r.t. DNSBLs you need to use
a dedicated IP as well.
Doesn't help with AOL. They track reputation by IP (they don't check SPF). I
would need a another IP for forwarding unfiltered mail to AOL - and it would be
a waste because it would be very quickly blacklisted.
--
Stuart D. Gathman <stuart(_at_)bmsi(_dot_)com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
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