[156083] in North American Network Operators' Group
Re: The End-To-End Internet (was Re: Blocking MX query)
daemon@ATHENA.MIT.EDU (John Levine)
Wed Sep 5 19:08:01 2012
Date: 5 Sep 2012 23:07:07 -0000
From: "John Levine" <johnl@iecc.com>
To: nanog@nanog.org
In-Reply-To: <5047AD0A.1060903@vocalabs.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
>Well, if you've got proper forward and reverse DNS, and your portable
>SMTP server identifies itself properly, and you are using networks that
>don't filter outbound port 25, AND you have DKIM configured correctly
>and aren't using it for a situation for which it is inappropriate, then
>you'll get the same results with a portable SMTP server that you would
>sending through a properly configured static server.
Not really. Large mail system like Gmail and Yahoo have a pretty good
map of the IPv4 address space. If you're sending from a residential
DSL or cable modem range, they'll likely reject any mail you send
directly no matter what you do.
R's,
John
