Date: Wed, 8 Nov 2000 12:02:04 -0500 (EST) From: Glenn McCalley <freebsd@mail.bnetmd.net> To: Len Conrad <lconrad@Go2France.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: MX-DNS-telnet sanity check Message-ID: <Pine.BSF.4.21.0011081201150.66705-100000@mail.bnetmd.net> In-Reply-To: <5.0.0.25.0.20001108175249.025b6eb0@mail.Go2France.com>
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Mucho thanks to Len and simond, I was afraid I'd slept through that chapter... :-) Glenn. On Wed, 8 Nov 2000, Len Conrad wrote: > At 11:48 08/11/00 -0500, you wrote: > >Hi all, more generic than FreeBSD, but hope somecan confirm/deny: > > > >We have a domain hosted on us, with an MX record pointing to another > >ISP. Mail worked just fine until this Monday morning. At that time, mail > >delivery through the MX'ed ISP went intermittent. By that, some mail is > >delivered OK, some mail is not. > > > >"Other ISP" are claiming that our DNS is set up incorrectly. > >domain.com. IN MX 0 mail.otherisp.net. > >--seems pretty straightforward to us, and has worked for over a year. > > > >The basis of their claim is their statement that running: > > > >bash# telnet domain.com 25 > > > >-- does not connect to their mail server, the target of the MX entry, but > >rather to the server where domain.com is housed. This is supposed to be > >proof that our DNS MX entry is wrong. > > false proof > > >Personally, I didn't know that specifying port 25 on a telnet connection > >would cause telnet to do an MX lookup > > if won't, of course. > > >and then connect to that address > >rather than the address for "domain.com". Am I missing this or are they > >blowing the smoke I think they are? > > the latter. > > telnet mailhost 25 > > ... is the way to test it. > > Len > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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