I'm actually dealing with the same issue as we speak. Out of racks of web servers doing shared hosting, MSN decided to block the eth0 on one of our Linux boxes. I called a friend and was given a direct number to level 3 MSN technical support; they are the last tier of support you can speak to about technical issues as they forward everything via email to the MSN NOC. Tier 3 support #: 877.606.9433 I spent sometime on the phone with an engineer (?) Jerry (Gerald) Jones at the above number. If you'd like you can reference my ticket number (103316949), which should have numerous comments on it and all the details concerning the SMTP relay issue at hand. FYI: MSN's email addresses are useless; I tried NOC@, Postmaster@, Network@ & Abuse@ to no avail. Hope this helps. Still waiting for the issue to be resolved though, ticket was created 4+ hours ago. Todd Mitchell ProNIC Solutions | -----Original Message----- | From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On | Behalf Of Mark E. Mallett | Sent: Wednesday, 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- | |