nanog mailing list archives

Re: Blocked by msn.com MX, contact for MSN.COM postmaster ?


From: "Mark E. Mallett" <mem () mv mv com>
Date: Wed, 29 Jan 2003 17:43:51 -0500


On Tue, Jan 28, 2003 at 11:49:16AM +0000, Miquel van Smoorenburg wrote:

I found out that our outgoing SMTP servers have been blocked by
the msn.com MXes. In a nasty way, too -- no SMTP error, the TCP
connection is simply closed by them immidiately after establishing it.
We're not listed on any RBL/DNSBL and have an active abuse desk.

I mailed postmaster () msn com, msnhst () msn com, noc () microsoft com,
but didn't get a reply from any of them. Does anyone here know
who to talk to ?

I'd be interested in knowing what you find out.  We observed the same
thing a while ago from one of our mail servers-- but just one.
Connection drops immediately, no clue given as to why.  However, from
another mail server just a few IP numbers away (in the same /24), the
connection goes through just fine.  The workaround was obviously to
configure the first mail server to relay mail for msn.com via the
second one, and to try to get Microsoft to tell us what was up.  No
luck on that last front though.

-mm-


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