[115422] in North American Network Operators' Group

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Re: Is your ISP blocking outgoing port 25?

daemon@ATHENA.MIT.EDU (Randy Bush)
Fri Jun 19 07:53:56 2009

Date: Fri, 19 Jun 2009 04:53:03 -0700
From: Randy Bush <randy@psg.com>
To: Jeroen Wunnink <jeroen@easyhosting.nl>
In-Reply-To: <4A3B43E7.70101@easyhosting.nl>
Cc: nanog list <nanog@nanog.org>
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.

for personal use, i have a box that has sshd running on 443 and i tunnel
2525 through it.  that worked even in the narita red rug when they were
at their blocking worst.

for customer use, i would push them to 465, 587 if less clued.

randy


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