Re: Has postini been taken over?

[Hank Nussbacher <hank () mail iucc ac il>]

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
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