nanog mailing list archives
Re: SMTP store and forward requires DSN for integrity
From: Matt Sergeant <msergeant () messagelabs com>
Date: Mon, 12 Dec 2005 14:23:14 -0500
On 10 Dec 2005, at 16:54, Douglas Otis wrote:
The BATV is a few lines of code that adds a private tag with a timelimit set in days. BATV helps dramatically by eliminating the DATA phaseand all that is involved in handling messages. In addition, once BATV becomes more widely deployed, the DSN refusal offers an alert about accepting more such messages from that IP address. BATV will make forged DSNs a thing of the past, irrespective of where a recipient list is checked, an AV or SPAM filter is added, etc.
And BATV will never be widely deployed because it breaks every single system out there that keys off the return path. And there are a lot of these systems.
Matt. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System.For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
Current thread:
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ), (continued)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) JP Velders (Dec 10)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) Douglas Otis (Dec 10)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) Jon Lewis (Dec 10)
- Re: SMTP store and forward requires DSN for integrity Andrew - Supernews (Dec 10)
- Re: SMTP store and forward requires DSN for integrity Douglas Otis (Dec 10)
- Re: SMTP store and forward requires DSN for integrity Todd Vierling (Dec 10)
- Re: SMTP store and forward requires DSN for integrity Andrew - Supernews (Dec 11)
- Re: SMTP store and forward requires DSN for integrity Micheal Patterson (Dec 11)
- Re: SMTP store and forward requires DSN for integrity Suresh Ramasubramanian (Dec 11)
- Re: SMTP store and forward requires DSN for integrity Rich Kulawiec (Dec 11)
- Re: SMTP store and forward requires DSN for integrity Matt Sergeant (Dec 12)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) mary (Dec 10)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) Steve Sobol (Dec 10)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) mary (Dec 10)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) Edward B. Dreger (Dec 10)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) Todd Vierling (Dec 10)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) Micheal Patterson (Dec 09)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) Micheal Patterson (Dec 09)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) Micheal Patterson (Dec 09)
- Re: SMTP store and forward requires DSN for integrity (wasRe:Clueless anti-virus ) Micheal Patterson (Dec 09)
- Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus ) Rich Kulawiec (Dec 10)