Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uwm.edu!linac!mp.cs.niu.edu!rickert
From: rickert@mp.cs.niu.edu (Neil Rickert)
Newsgroups: comp.mail.sendmail
Subject: Re: Help configuring sendmail in subdomain on NeXT cube
Message-ID: <1991Jun5.221623.20086@mp.cs.niu.edu>
Date: 5 Jun 91 22:16:23 GMT
References: <172680@tiger.oxy.edu>
Distribution: usa
Organization: Northern Illinois University
Lines: 50

In article <172680@tiger.oxy.edu> prophet@oxy.edu (Dale Bruce LaFountain) writes:
>I have since changed the hostname to the full domainname (cub.math.oxy.edu)
>and all of the above partially qualified addresses became fully qualified.
>However, this is not a good solution to this problem.

  You can always define $w to be the fully qualified name, early in
sendmail.cf

	Dwcub.math.oxy.edu

 Actually, if you have a 'sendmail.mx' you should probably be using that, in
which case you may not need the Dw line.

>To make matters worse, sending mail from bobcat.oxy.edu to cub.math.oxy.edu
>will bounce, giving the error message 'Cannot find hostname "cub" "." "math"
>in domain "oxy.edu".'  I can, however, send mail to both 'prophet@cub' and

  This is a sure sign the address is not being recognized as local.

>Several questions arise from my above ramblings:
>1) Why does sendmail look at my hostname instead of my domainname when
>    building the mail headers? (and the next logical question of how
>    to fix it...)

  It uses $j.  You defined $j to be $w which is your hostname.  If you make
$w your fully qualified hostname, and define $j after defining $w, this
problem will be resolved.

>2) Why does sendmail recognize user@cub.math.oxy.edu when mailed locally
>    (even though it mungs the address anyway) but doesn't recognize it when
>    mail comes through the SMTP port?

  Because you didn't kill and restart the daemon after changing sendmail.cf.
Your SMTP daemon is still running on the old configuration.

>3) Why does sendmail chop the To: line down to the domain of my machine when
>    sending mail to myself with a fully qualified address?

  Very likely there is a hostname lookup taking place.  If you use
	1.2.3.4		cub	cub.math.oxy.edu
you are telling it that 'cub' is the official name, and 'cub.math.oxy.edu'
is an alias.  If you go to a 'sendmail.mx' version, and have /etc/resolv.conf
pointing to a suitable nameserver, this problem will probably go away.


-- 
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  Neil W. Rickert, Computer Science               <rickert@cs.niu.edu>
  Northern Illinois Univ.
  DeKalb, IL 60115                                   +1-815-753-6940