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Date: Fri, 13 Jul 2001 23:46:01 +0200 (MET DST)
From: Anders Andersson <andersa@DoCS.UU.SE>
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To: newsletter-support@cnet.com
cc: CNET_Digital_Dispatch@one.digital.cnet.com, postmaster@cnet.com
Subject: Re: CNET_Digital_Dispatch@one.digital.cnet.com  (KMM1087650C0KM)
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CNET Newsletter Support <newsletter-support@cnet.com> wrote:
>That's not a valid mailto.  What's your error or bug report please?

Are you saying that <CNET_Digital_Dispatch@one.digital.cnet.com>
is not a valid e-mail address?  If so, why can I send mail to it?

	220 uuinc11smtp1.uu.flonetwork.com ESMTP Postfix
	HELO zork.it.uu.se
	250 uuinc11smtp1.uu.flonetwork.com
	MAIL FROM:<postmaster@DoCS.UU.SE>
	250 Ok
	RCPT TO:<CNET_Digital_Dispatch@one.digital.cnet.com>
	250 Ok
	DATA
	354 End data with <CR><LF>.<CR><LF>
	From: postmaster@DoCS.UU.SE
	To: CNET_Digital_Dispatch@one.digital.cnet.com
	Subject: Test
	
	This is an e-mail connectivity test.  Please confirm receipt.
	.
	250 Ok: queued as 0228B7C02
	QUIT
	221 Bye

No SMTP error, and I have never received a bounced message for
that address.  It sure looks valid to me...  And if it still
isn't valid, then how come it sends mail to us?  You don't say
that you use fake sender addresses on your outbound e-mail, do
you?  Here is a header excerpt from a timestamped message:

Return-Path: <CNET_Digital_Dispatch@one.digital.cnet.com>
Received: from uuout11smtp6.uu.flonetwork.com ([205.150.6.46]:2159 "EHLO
        uuout11smtp6.uu.flonetwork.com") by emberiza.its.uu.se with ESMTP
        id <S12417AbRGFCB6>; Fri, 6 Jul 2001 04:01:58 +0200

The Return-Path line indicates the SMTP envelope sender address,
as specified in MAIL FROM.  It must be a valid mailbox, or we
won't be able to return an error message to the sender if there
is a delivery problem.  It must not be a null sink that throws
away everything sent to it.

Regards,
Anders Andersson, Dept. of Computer Systems, Uppsala University
Paper Mail: Box 325, S-751 05 UPPSALA, Sweden
Phone: +46 18 4713170   EMail: andersa@DoCS.UU.SE