From owner-freebsd-isp Fri Sep 29 7:14:39 2000 Delivered-To: freebsd-isp@freebsd.org Received: from falcon.prod.itd.earthlink.net (falcon.prod.itd.earthlink.net [207.217.120.74]) by hub.freebsd.org (Postfix) with ESMTP id DBB7937B422; Fri, 29 Sep 2000 07:14:34 -0700 (PDT) Received: from veager.siteplus.net (1Cust36.tnt9.chattanooga.tn.da.uu.net [63.39.120.36]) by falcon.prod.itd.earthlink.net (8.9.3-EL_1_3/8.9.3) with ESMTP id HAA12702; Fri, 29 Sep 2000 07:14:25 -0700 (PDT) Date: Fri, 29 Sep 2000 10:14:23 -0400 (EDT) From: Jim Weeks To: Jan Knepper Cc: freebsd-questions@FreeBSD.ORG, freebsd-isp@FreeBSD.ORG Subject: Re: DNS: having domain1.com and domain1.net point to the same IP. In-Reply-To: <39D4A0C2.2F93A24C@smartsoft.cc> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Fri, 29 Sep 2000, Jan Knepper wrote: > No an example of a daemon that would choke, but UUnet didn't have my reverse-DNS > setup so the reverse lookup's didn't work. > > For that reason I resend (this) messages, because I didn't see it appear on the > list. > > Appearantly SMTP (as postfix) checks via a reverse lookup whether or not a host > really exists. When it does not, it does not accept the message. I guess my point is that what you are describing would fail with CNAMES as well. Reverse lookups are like Highlanders. "There can be only one." Cheers, Jim To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message