Path: utzoo!attcan!uunet!cs.utexas.edu!rutgers!mit-eddie!uw-beaver!blake!oregon!dsmith From: dsmith@oregon.uoregon.edu (Dale Smith) Newsgroups: comp.protocols.tcp-ip Subject: Re: sendmail hanging during SMTP session Message-ID: <3215@oregon.uoregon.edu> Date: 25 May 89 14:56:24 GMT References: <8905191734.AA04830@fji.isi.edu> Organization: University of Oregon Lines: 54 While we are on the subject of mail, is anyone else having terrible trouble delivering mail to the UK? I have have had consistent problems for some time now (6 weeks?). I ignored it for awhile, but this discussion got me to poking about and it looks like someone between me and nsfnet-relay.ac.uk is dropping packets longer than 500 bytes or so. Note that the packets are not getting fragmented, they are getting dropped. Now, I could crank down the MTU on my mail host, but I also use it for all kinds of other things and that would kill me for performance. Any advice? Pointers? Anyone who has no trouble willing to act as a mail forwarder for me for .uk mail? At the end of this message is a traceroute between myself and nsfnet-relay.ac.uk. (128.86.8.6). Thanks, Dale Smith Asst Dir of Network Services Internet: dsmith@oregon.uoregon.edu University of Oregon BITNET: dsmith@oregon.bitnet Computing Center UUCP: ...hp-pcd!uoregon!dsmith Eugene, OR 97403-1212 Voice: (503)686-4394 ---------------------------------------------------------------------- hogg# traceroute 128.86.8.6 traceroute to 128.86.8.6 (128.86.8.6), 30 hops max, 38 byte packets 1 uo-gw.uoregon.edu (128.223.20.1) 20 ms 0 ms 20 ms 2 192.33.18.10 (192.33.18.10) 500 ms 200 ms 180 ms 3 192.31.215.10 (192.31.215.10) 560 ms 560 ms 380 ms 4 129.101.101.10 (129.101.101.10) 1260 ms 580 ms 980 ms 5 192.31.216.10 (192.31.216.10) 1000 ms 640 ms 660 ms 6 192.35.180.3 (192.35.180.3) 700 ms 2500 ms 2020 ms 7 129.140.70.14 (129.140.70.14) 400 ms 400 ms 460 ms 8 129.140.71.6 (129.140.71.6) 440 ms 1200 ms 460 ms 9 129.140.81.7 (129.140.81.7) 500 ms 740 ms 480 ms 10 129.140.72.17 (129.140.72.17) 560 ms 1100 ms 740 ms 11 * * * 12 ford-gateway.csc.org (128.121.54.73) 600 ms 680 ms 580 ms 13 128.121.54.78 (128.121.54.78) 580 ms 740 ms 540 ms 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * NSFNET-RELAY.AC.UK (128.86.8.6) 1600 ms 1660 ms