Have you tried abuse@msn.com.. maybe abuse@hotmail.com (they could forward you).. They are quite responsive (hotmail, abuse), at least from a hotmail address :). mark -- Mark Segal Director, Data Services Futureway Communications Inc. Tel: (905)326-1570

-----Original Message----- From: Mark E. Mallett [mailto:mem@mv.mv.com] Sent: January 29, 2003 5:44 PM To: Miquel van Smoorenburg Cc: nanog@merit.edu Subject: Re: Blocked by msn.com MX, contact for MSN.COM postmaster ?

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-