mcb@ncis.tis.llnl.gov (Michael C. Berch) (05/05/89)
Our site hosts the MHSNEWS (X.400) and IFIP-GTWY (RFC987 stuff) Internet mailing lists, and recently a number of the addresses on the list have become undeliverable. A number of things have changed around here, including an upgrade from SunOS 3.5 to 4.0 on the sending host (tis.llnl.gov), an IP address change, and a couple mods to our sendmail config, but none of them should really affect anything. We're running Sun Sendmail 4.0. The undeliverable sites all appear to be running MMDF (at least that's what the banner looks like), and they all give the same error in response to the MAIL command, as shown below. Occasionally the response is "451 Nameserver timeout during parsing" instead of what's shown. Sites that have done this include sh.cs.net, brl.mil, cc5.bbn.com, and a couple of others. I should point out that during this period our host has delivered mail to zillions of other Internet hosts, most of them sendmail sites plus a few TOPS-20 and VMS and what-have-you, without any problems, and our zone name server and its parent seem to be working just fine. Anybody got a clue? David Herron, are you out there? Michael C. Berch mcb@ncis.llnl.gov / uunet!ncis.llnl.gov!mcb ----- Transcript of SMTP session: Running AA18351 arpa-mhs-bboard@sh.cs.net... Connecting to sh.cs.net via tcp... Trying 192.31.103.3... connected. 220 sh.cs.net Server SMTP (Complaints/bugs to: Postmaster@SH.CS.NET) >>> HELO tis.llnl.gov 250 sh.cs.net - you are a charlatan >>> MAIL From:<ifip-gtwy-request@tis.llnl.gov> 451 [ Invalid argument ] Nameserver timeout for 'ifip-gtwy-request@tis.llnl.gov >>> QUIT 221 sh.cs.net says goodbye to [128.115.26.3] at Wed May 3 19:17:35. arpa-mhs-bboard@sh.cs.net... Deferred: [ Invalid argument ] Nameserver timeout for 'ifip-gtwy-request@tis.llnl.gov