Date: Fri, 2 Feb 1996 14:04:52 PST From: Bill Fenner <fenner@parc.xerox.com> To: dwhite@resnet.uoregon.edu Cc: questions@freebsd.org Subject: Re: sendmail: mail loops back to myself Message-ID: <96Feb2.140454pst.177478@crevenia.parc.xerox.com> In-Reply-To: Your message of "Wed, 10 Jan 1996 10:06:51 PST." <Pine.BSF.3.91.960110100351.1144A-100000@gdi.uoregon.edu>
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In message <Pine.BSF.3.91.960110100351.1144A-100000@gdi.uoregon.edu>you write: >I keep getting messages back from MAILER_DAEMON about messages that loop >back to myself. > >How do I fix these? > >Someone else posted and I didn't get a response. > >My machine's name is `riley-net170-164' wiht a CNAME to `gdi'. You have your machine configured to think that its name is gdi.uoregon.edu; however, gdi.uoregon.edu is a CNAME that points to riley-net170-164.uoregon.edu . Now, it's illegal to send email to a CNAME, so when anyone sends mail to user@gdi.uoregon.edu the mailer will automatically change it to user@riley-net170-164.uoregon.edu . Since your machine thinks its name is gdi.uoregon.edu, it doesn't know how to deliver that mail. Since it's illegal to put "gdi.uoregon.edu" in any mail headers, your best course of action is to tell sendmail that your host's name is "riley-net170-164.uoregon.edu", by putting "Djriley-net170-164.uoregon.edu" in your /etc/sendmail.cf . If you really want to be able to use "gdi.uoregon.edu" in your mail headers, then you'll have to get your DNS administrators to use either an A record or an MX record, and then make sure that "riley-net170-164.uoregon.edu" is in your "Cw" line in /etc/sendmail.cf . Bill
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