[...]
So I went to the manual to see what this would do.
http://www.stalker.com/mac/SIMS/AntiSpam.html#MailFrom
When the Verify Return-Path option is selected in the SMTP Service Settings, the SMTP module parses the message Return-Path (Mail From) addresses, and the module refuses to receive a message if:
* the Return-Path domain name is an empty string (no domain specified); * the Return-Path address is routed (via the Server Router) to the ERROR address; * the Domain Name System does not have neither MX nor A records for the Return-Path domain (an unregistered domain); * the Domain Name System has an MX record for the Return-Path domain, but it points to an A-record that does not exist (a faked domain); * the A-record or the the highest-priority MX record for the Return-Path domain points onto an IP address included in the Black List; * the Return-Path domain name is specified as an IP address, and that address is not included into the Client Hosts list.
It looks like bullet points 3 and 4 are no longer worthwhile, but 5 will make Aron's suggestion worthwhile as long as we know what Verisign will return. Can anyone verify that it does what I think it says?
Effectively, this is not unlike a RBL. You do a lookup and if it returns a particular IP and that IP is in the blacklist, the site is blocked.
Unfortunately, my testing indicates that this does not work as documented, at least not in 1.8b9d14.
-- Bill Cole [EMAIL PROTECTED]
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