Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!snorkelwacker!mit-eddie!apollo!apollo.hp.com!mishkin From: mishkin@apollo.HP.COM (Nathaniel Mishkin) Newsgroups: comp.protocols.tcp-ip Subject: Curious SMTP behavior Message-ID: <48f06f20.20b6d@apollo.HP.COM> Date: 1 Mar 90 20:20:00 GMT Sender: root@apollo.HP.COM Reply-To: mishkin@apollo.HP.COM (Nathaniel Mishkin) Organization: Hewlett-Packard Apollo Division - Chelmsford, MA Lines: 34 I'm trying to figure out why I'm having difficulty talking to certain SMTP servers. Here's a sample dialog (output from my SMTP client): Running AA18102 ,... Connecting to BBN.COM (tcp)... 220 bbn.com Server SMTP (Complaints/bugs to: Postmaster@BBN.COM) >>> HELO amway.apollo.com 250 bbn.com - you are a charlatan >>> MAIL From: 451 Nameserver timeout during parsing >>> QUIT 221 bbn.com says goodbye to amway.ch.apollo.hp.com at Thu Mar 1 14:24:51. ,... Deferred: No such file or directory I understand why the "you are a charlatan" message is coming out. (Presumably the server is back mapping my IP address and noticing that it doesn't map to "amway.apollo.com".) This is just a nuisance message, as far as I can tell. The real problem is the: >>> MAIL From: 451 Nameserver timeout during parsing Does anyone out there know what the SMTP server is trying to do that might induce it to print out that message? All I can imagine is that the server is trying to resolve "apollo.com" (although it's not really clear why it'd bother). As far as I know, no one else is having problems resolving "apollo.com". Thanks for any help. -- Nat Mishkin Hewlett Packard Company / Apollo Systems Division mishkin@apollo.com