[116927] in North American Network Operators' Group
RE: MTAs used
daemon@ATHENA.MIT.EDU (Scott Berkman)
Wed Aug 26 18:43:43 2009
From: "Scott Berkman" <scott@sberkman.net>
To: "'Deepak Jain'" <deepak@ai.net>, <Valdis.Kletnieks@vt.edu>,
"'Sharef Mustafa'" <sharef.mustafa@paltel.net>
In-Reply-To: <D338D1613B32624285BB321A5CF3DB250CED2D102B@ginga.ai.net>
Date: Wed, 26 Aug 2009 18:43:26 -0400
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
If I had to guess..
Postfix
Sendmail
Exim
ComminigatePro
Beyond those you'd probably see a lot of the free webmail carriers (Gmail,
yahoo, and hotmail/live all use "custom" MTA's) as well as IPSwitch's iMail
and the Windows Server/IIS SMTP service.
-Scott
-----Original Message-----
From: Deepak Jain [mailto:deepak@ai.net]
Sent: Wednesday, August 26, 2009 4:10 PM
To: Valdis.Kletnieks@vt.edu; Sharef Mustafa
Cc: nanog@nanog.org
Subject: RE: MTAs used
> Now, did you want that in terms of "number of copies installed" or
> "amount of mail handled"? There's probably zillions of little Fedora
> and
> Ubuntu boxes running whatever MTA came off the disk that are handling 1
> or 2 pieces of mail a day, and then there's whatever backends are used
> by MSN/Hotmail, Yahoo, AOL, etc. "This MTA packed by weight, not by
> volume.
> Some settling of contents may have occurred during shipping and
> spamming."
>
> (Seriously - if 95% of the mail out there is spam, then the top 4-5
> MTAs are probably the ratware that's sending out the spam. Something
> to consider...)
In keeping with this concept, and turning it around. What MTA is exposed to
the most spam? (1-x) That should tell you what MTA handles the most "good"
mail by also being the destination for the most spam (good, live
recipients).
Or I could be missing something well known about mail flows.
Deepak
