[Mimedefang] Message header madness - was Re: SPF Usefulness (was Re: SNARE spam detection)

Kenneth Porter shiva at sewingwitch.com
Fri Jul 31 10:13:23 EDT 2009

--On Friday, July 31, 2009 2:35 AM -0700 - <kd6lvw at yahoo.com> wrote:

> Even on Usenet, there are people who use "Reply-To" specifying a mailbox
> under the reserved ".invalid" TLD and other values like "example.com".

This is backwards. You put the anti-spam address in From: and the real 
address in Reply-to:. That's because the From: header is available when 
requesting headers for all new messages (typically used by spammers for 
address harvesting) but the Reply-to: header is only available when 
downloading entire messages (expensive in time for spammers). (Xnews lets 
you set these independently, and the "real" address is used for From: when 
replying to poster (by email).)

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