[http://dummy.us.eu.org/robert (Robert)]

 > From: Mark Delany <http://www.yahoo-inc.com/~markd>
 > Date: Sun, 27 Jun 2004 16:25:50 +0000
 >

Re: Sender: field.  Excellent!

Re: forging From:.  Yeah, but if you trust the encapsulated domain with
signature, then all should still be copacetic.

 > > My main fear is that, at some point, some companies/persons will stop
 > > accepting mail that has not been signed due to the possible CPU overhead
 > > involved in accepting such unsigned mail.
 > 
 > I don't follow you here. What CPU overhead is there in accepting
 > "unsigned" email?

'Cause you have to resort to standard spam fighting methods in that case,
which seem to be becoming more and more CPU expensive as spammers get
smarter and the spam filters have to get accordingly more sophisticated.

 > Mark.