[183604] in North American Network Operators' Group
outlook.com outgoing blacklists?
daemon@ATHENA.MIT.EDU (Todd K Grand)
Wed Sep 9 14:14:09 2015
X-Original-To: nanog@nanog.org
From: "Todd K Grand" <tgrand@tgrand.com>
To: <nanog@nanog.org>
Date: Wed, 9 Sep 2015 11:49:30 -0500
Errors-To: nanog-bounces@nanog.org
I have an email server which hosts 3 domains.
I have reason to believe that microsoft maintains an outgoing blacklist =
and would like confirmation on this.
I have had many a report that people on domains hosted on =
hotmail/outlook are getting messages bounced back stating that our =
server was unreachable.
This only happens for one of the three domains hosted on our server.
I went to outlook.com and setup an account.
When I create a new message and enter the recipient at that affected =
domain, the address immediately turns red, and when I hover over it =
states that
the address may not be valid.
This happens without ever sending a packet to our servers.
The affected domain can send emails to hotmail/outlook accounts just =
fine.
Anybody have some recommendations on how I resolve this, as Microsoft =
support seems to be under technical.
Thanks,
Todd K. Grand
