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Hi. I have a RH 6.0 box attached to a LAN, and I have found an unusual mail issue: the mail goes out but it doesn't come in! I can send mail to any other machine on the network, but when any other machine tries to send mail to me, it bounces. After a little digging, I found the "verbose switch" in /bin/mail which yielded the following "sendmail conversation" between bishop (a Solarix box on the LAN) and cam-katz (the linux box in question): ------------------------------------------------------------------------- bishop:/users/dkatz[1]% mail -v dkatz at cam-katz Subject: verbosity test This is also a verbosity test. EOT bishop:/users/dkatz[2]% dkatz at cam-katz... Connecting to dhcp-250-11.kenan.com. via esmtp... 220 cam-katz.kenan.com ESMTP Sendmail 8.9.3/8.9.3; Fri, 15 Oct 1999 16:01:58 -0400 >>> EHLO bishop.kenan.COM 250-cam-katz.kenan.com Hello bishop.kenan.com [198.187.250.57], pleased to meet you 250-EXPN 250-VERB 250-8BITMIME 250-SIZE 250-DSN 250-ONEX 250-ETRN 250-XUSR 250 HELP >>> MAIL From:<dkatz at bishop.kenan.COM> SIZE=94 250 <dkatz at bishop.kenan.COM>... Sender ok >>> RCPT To:<dkatz at dhcp-250-11.kenan.com> 550 <dkatz at dhcp-250-11.kenan.com>... Relaying denied dkatz at cam-katz... User unknown >>> RSET 250 Reset state ---------------------------------------------------------------------------- I assure you that dkatz is a valid user on cam-katz, so the questions are: a) How does sendmail decide if a user is "known" or not? b) Is this an intentional security feature or a configuration error? c) Has anyone else seen this and do you know how to fix it. While I don't mind reading documentation, the Sendmail book is a bit long to read casually. I'm hoping you can help me avoid that fate. Thanx. Dan Katz - Subcription/unsubscription/info requests: send e-mail with "subscribe", "unsubscribe", or "info" on the first line of the message body to discuss-request at blu.org (Subject line is ignored).
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