Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!uunet!jarthur!ucivax!orion.oac.uci.edu!ucsd!brian From: brian@ucsd.Edu (Brian Kantor) Newsgroups: comp.protocols.tcp-ip.domains Subject: Re: problems with nsfnet-relay.ac.uk Message-ID: <29288@ucsd.Edu> Date: 5 Mar 91 17:46:01 GMT References: <9103021528.AA09106@rimfaxe.diku.dk> <3115@charon.cwi.nl> Distribution: inet Organization: The Avant-Garde of the Now, Ltd. Lines: 19 If your sendmail doesn't accept the connection, so that my sendmail times out trying, my sendmail will mark your host down and skip all other delivery attempts to it in this queue run. If you accept the connection then 421 it, our sendmail will attempt to separately deliver every damn one of the messages we have queued for your site and will get a 421 for each one of them, which means that both you and I have just spawned one process for each of the messages just to get a "go away" message. Consider for a moment what would be happening to nsfnet-relay.ac.uk if it were answering 421 instead of just letting connections time out? UCSD is only one site, and we have over 150 messages queued for them right now. Multiply that by the number of other sites that have stuff in the queue for them, and you have a real mess. Don't do the 421 thing, please. The AT&T gateway did and it was a disaster. They now time out connections when they're busy. - Brian