From owner-freebsd-questions Wed Nov 26 06:33:39 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id GAA20452 for questions-outgoing; Wed, 26 Nov 1997 06:33:39 -0800 (PST) (envelope-from owner-freebsd-questions) Received: from earth.colstate.edu (earth.ColState.EDU [168.26.193.20]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id GAA20444 for ; Wed, 26 Nov 1997 06:33:35 -0800 (PST) (envelope-from PLAZAS_CHRISTIAN@COLSTATE.EDU) Received: from colstate.edu (mercury.ColState.EDU [168.26.193.32]) by earth.colstate.edu (8.8.5/8.7.3) with ESMTP id KAA04745 for ; Wed, 26 Nov 1997 10:02:27 -0500 (EST) Received: from CCMAIN/SpoolDir by colstate.edu (Mercury 1.32); 26 Nov 97 09:32:29 EST Received: from SpoolDir by CCMAIN (Mercury 1.32); 26 Nov 97 09:32:28 EST From: "Christian" Organization: Columbus State Univ., Columbus, Ga. To: questions@freebsd.org Date: Wed, 26 Nov 1997 09:32:24 EST MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: Mail problems Priority: normal X-mailer: Pegasus Mail for Windows (v2.52) Message-ID: <17EE3E869F2@colstate.edu> Sender: owner-freebsd-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Hi all, I am having problems sending mail to an organization on the internet. The organization is mtna.org. Our freebsd-2.2 based mail server keeps sending me host unknown messages. I have tried to track it down and I think I know what may be causing the problem, and I need some confirmation. The mail exchanger for mtna.org is a machine called mtna_pdc.mtna.org . I vaguely recall a discussion on one of the freebsd mailing lists a few months ago, about the fact that having a hostname with an underscore violates some RFC. I suspect this is the problem I am running into. To test my theory I changed one of the hostnames on my network to a hostname containing an underscore and tried to send mail to it...I got the exact same error message I was getting when I tried to send mail to mtna.org. I then changed the hostname to one which had a dash instead of an underscore, sent mail again , and everything worked fine. Would just like to know if this is indeed the problem, and if so, what the relevant RFC number is so that I can talk to the folks at mtna.org so they can change their host name. Thanks, C.P. ---------------------------------------------- Christian Plazas Columbus State University (706)568-2063