Intersting idea but the BATV appears to be something that you would need to run on the MTA level (i.e the MailServer would need to support the functionality) because it rewrites the return address on outgoing emails.
On a side note, I have noticed a significant drop in backscatter when SPF is implemented for the particular domain. Most of the backscatter appears to come from valid antispam appliances like the Barracuda boxes which would normally use SPF. These devices perform the SPF test during the SMTP connection and rejects it immediately as opposed to bouncing the message back. So the SPF does help. -Matt From: Message Sniffer Community [mailto:[EMAIL PROTECTED] On Behalf Of Matthew J. Grim Sent: Sunday, June 29, 2008 1:25 AM To: Message Sniffer Community Subject: [sniffer] Re: Backscatter Spam As an aside, Mdaemon has an excellent backscatter prevention system. They appear to be using BATV <http://en.wikipedia.org/wiki/Bounce_Address_Tag_Validationhttp:/en.wikipedi a.org/wiki/Bounce_Address_Tag_Validation> , an internet draft at the moment. Matt in Tampa
