[73368] in North American Network Operators' Group
Re: Has postini been taken over?
daemon@ATHENA.MIT.EDU (Hank Nussbacher)
Fri Aug 20 00:56:22 2004
Date: Fri, 20 Aug 2004 07:53:05 +0300
To: Jay Hennigan <jay@west.net>
From: Hank Nussbacher <hank@mail.iucc.ac.il>
Cc: nanog@merit.edu
In-Reply-To: <Pine.LNX.4.58.0408190911070.14917@ohtf.fo.jrfg.arg>
Errors-To: owner-nanog-outgoing@merit.edu
At 09:14 AM 19-08-04 -0700, Jay Hennigan wrote:
>Have you or a mail administrator for your domain signed up with Postini
>for spam filtering? If so, all mail for the domain will flow through
>Postini's servers. If your mailbox isn't enabled for filtering or is
>set to not filter, all the spam you previously got from anywhere will
>show Postini in the headers. For that matter, all of your mail to that
>address will have Postini in the headers.
How exactly does "all mail for the domain will flow through
Postini's servers"? I ask since the IP sending to some postini IP like
exprod5mx30.postini.com is blocked for outgoing port 25+80. That means
that the data is flowing to postini in 1 of the following ways:
a) auto-GRE tunnels
b) email packaged in some way
c) email is being sent via some dialup/DSL connection to postini
I am just trying to understand how postini is bypassing my anti-spam ACLs.
-Hank
>--
>Jay Hennigan - CCIE #7880 - Network Administration - jay@west.net
>WestNet: Connecting you to the planet. 805 884-6323 WB6RDV
>NetLojix Communications, Inc. - http://www.netlojix.com/
