[118531] in North American Network Operators' Group
Re: ISP port blocking practice
daemon@ATHENA.MIT.EDU (Joe Maimon)
Thu Oct 22 21:42:27 2009
Date: Thu, 22 Oct 2009 21:41:25 -0400
From: Joe Maimon <jmaimon@ttec.com>
To: Justin Shore <justin@justinshore.com>
In-Reply-To: <4AE106F7.3090302@justinshore.com>
Cc: North American Networking and Offtopic Gripes List <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Justin Shore wrote:
> The vast majority, I'm
> sorry to say, used Microsoft Exchange which to the best of my knowledge
> doesn't support RFC2476.
You can configure exchange to use additional smtp virtual servers and
bind them to specific ports. You can also require authentication to
access the ports and you can restrict it to users. You can also enable
it for STARTTLS.
What I dont know is whether Exchange has or ever will support SMTPS
which is strange considering many versions of outlook default to try
that for any secured port other than 25.
> I wish more people would use it though. My users wouldn't have cause to
> get so upset when I tell them that they have to pay monthly for a static
> IP to use tcp/25. It would reduce my hassles a wee bit.
I have many a time recommended consulting customers to follow up with
their mail provider to see if they has any plans to support the rfc
standard, but I dont share much enthusiasm for complete adoption. I do
believe it is getting better.
>
> Justin
>
>
