If you could please point me to blacklists that are using Sender
Verification as qualification for being on it, I'd be interested in
seeing this. This feature has been around for some 10 years as a
means for helping to thwart spam. It would seem to me this is a win
for the spammers if they are doing this. Granted, I do agree that SPF
or the like is a more resource friendly solution in the end. It is
very effective for smaller sites and I've never been had any
complaints about being blacklisted for it's use. I have seen
dampening type activity when a larger amount of probes get sent for
one particular domain due to volume of spam coming from that
particular domain. But no black lists.
Thanks for the response in advance!
Regards
Jim
On Sep 12, 2009, at 5:19 PM, Charles Marcus wrote:
On 9/12/2009 1:00 PM, James Hankins wrote:
One way, albiet expensive on CPU util is reject_unverified_sender.
Sends probes to determine if address is valid before accepting
delivery.
Careful... applying Sender Verification to all inbound mail is a
form of
abuse and will eventually get you on many blacklists.
--
Best regards,
Charles
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