Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ukma!david From: david@ms.uky.edu (David Herron -- One of the vertebrae) Newsgroups: comp.protocols.tcp-ip Subject: Broken SMTP daemon @ WPAFB-FDL.ARPA Message-ID: <11255@s.ms.uky.edu> Date: 13 Mar 89 21:52:34 GMT Organization: U of Ky, Math. Sciences, Lexington KY Lines: 42 Someone call the protocol police! Script started on Mon Mar 13 16:45:18 1989 You have mail. | 1 - s:david --> telnet wpafb-fdl.arpa smtp Trying... Connected to wpafb-fdl.arpa. Escape character is '^]'. 220 HYPER-LINK VAX/VMS Simple Mail Transfer Service ready. helo e.ms.uky.edu -----> 501 Syntax error in parameters or arguments. mail from: 250 Requested mail action okay, completed. rcpt to: 250 Requested mail action okay, completed. data 354 Start mail input; end with .. From: david@ms.uky.edu To: edwardsrl@wpafl-fdl.arpa Subject: test I'm demonstrating to comp.protocols.tcp-ip that your mailer is broken. . 250 Requested mail action okay, completed. quit 221 HYPER-LINK VAX/VMS Service closing transmission channel. Connection closed by foreign host. | 2 - s:david --> script done on Mon Mar 13 16:47:07 1989 The marked line is in error. I just checked in RFC-821 to make certain and it says in section 4.1.1 that the HELO command and an affirmative reply are necessary to ensure that both mailers are in sync. Further in section 4.3 in the COMMAND-REPLY SEQUENCES, the only allowable "Success" reply is a "250", "501" is an "Error" reply. -- <-- David Herron; an MMDF guy <-- ska: David le casse\*' {rutgers,uunet}!ukma!david, david@UKMA.BITNET <-- <-- For a good time send mail to somebody@ms.uky.edu