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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Blocked by msn.com MX, contact for MSN.COM postmaster ?
Miquel van Smoorenburg([email protected])@2003.01.28 11:49:16 +0000: > > 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. Miquel, does this problem still endure? I had such a thing quite a while ago (mid-2002) with them, but apparently it was a temporary problem of their MX in servers. I am also not listed in RBLs (due to pretty restrictive relaying policy) and the like, I was also _not_ able to reach someone at their end ([email protected]). After several hours of closed sockets, everything just worked again. Right now, our mail to msn.com goes via smtp-gw-4.msn.com(207.46.181.13) which appears to work: 220 cpimssmtpa19.msn.com Microsoft ESMTP MAIL Service, Version: 5.0.2195.4905 ready at Tue, 28 Jan 2003 06:09:46 -0800 Apparently their service runs on some successor of Win2000, so I wouldn't be very surprised, if it turned out to be resource shortage on their end (WRT things like The Worm Of The Week[tm] and the like). A misconfigured proxy or load balancing device might be another option. Also, their clock is off by approx. five minutes. Their system apparently lacks NTP support, or the clocks in Redmond are 5 minutes behind the rest of the world... :-> Oh no - not-so-funny - they got different clock drift for every machine (cpimssmtpa[01..40].msn.com) that happens to pop up when connecting to their best preference MX. Looks like they DNS-loadbalance their loadbalancers for SMTP, too. Funny. Regards, /k[Ok-I-am-silent-now]arsten -- > Motto of the Electrical Engineer: > Working computer hardware is a lot like an erect penis: it > stays up as long as you don't fuck with it. WebMonster Community Project -- Reliable and quick since 1998 -- All on BSD http://www.webmonster.de/ - ftp://ftp.webmonster.de/ - http://www.rohrbach.de/ GnuPG: 0xDEC948A6 D/E BF11 83E8 84A1 F996 68B4 A113 B393 6BF4 DEC9 48A6 REVOKED: 0x2964BF46 D/E 42F9 9FFF 50D4 2F38 DBEE DF22 3340 4F4E 2964 BF46 REVOKED: 0x4C44DA59 RSA F9 A0 DF 91 74 07 6A 1C 5F 0B E0 6B 4D CD 8C 44 Please do not remove my address from To: and Cc: fields in mailing lists. 10x
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