[115418] in North American Network Operators' Group
Re: Is your ISP blocking outgoing port 25?
daemon@ATHENA.MIT.EDU (Jeroen Wunnink)
Fri Jun 19 03:54:07 2009
Date: Fri, 19 Jun 2009 09:53:11 +0200
From: Jeroen Wunnink <jeroen@easyhosting.nl>
To: nanog list <nanog@nanog.org>
In-Reply-To: <1245356861.8442.6.camel@legolas.orthanc.ca>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
We just open port 2525 for customers from ISP's blocking official SMTP
ports so they can use their dedicated servers/domain mailservers.
Lyndon Nerenberg wrote:
> On Thu, 2009-06-18 at 16:14 -0400, Joe Provo wrote:
>
>> then you should be shifting your userbase to authenticated on the
>> SUBMIT
>> port [587] anyway...
>>
>
> Except for those ISPs who choose to intercept port 587 as well. This is
> a big problem with Rogers in Vancouver. They hijack port 587 connections
> through some sort of lame proxy that connects you to your intended host,
> but strips the AUTH field out of the EHLO response from the remote
> submission server ...
>
>
>
--
Met vriendelijke groet,
Jeroen Wunnink,
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