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From: Charles Marcus (CMarcusMedia-Brokers.com)
Date: Sat Sep 12 2009 - 16:19:00 CDT
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
Careful... applying Sender Verification to all inbound mail is a form of
abuse and will eventually get you on many blacklists.