From owner-freebsd-questions Fri Nov 9 17:21:35 2001 Delivered-To: freebsd-questions@freebsd.org Received: from mailsrv.otenet.gr (mailsrv.otenet.gr [195.170.0.5]) by hub.freebsd.org (Postfix) with ESMTP id 2131D37B416 for ; Fri, 9 Nov 2001 17:21:31 -0800 (PST) Received: from hades.hell.gr (patr530-a207.otenet.gr [212.205.215.207]) by mailsrv.otenet.gr (8.11.5/8.11.5) with ESMTP id fAA1LQB05427; Sat, 10 Nov 2001 03:21:26 +0200 (EET) Received: (from charon@localhost) by hades.hell.gr (8.11.6/8.11.6) id fAA0RQc01032; Sat, 10 Nov 2001 02:27:26 +0200 (EET) (envelope-from charon@labs.gr) Date: Sat, 10 Nov 2001 02:27:26 +0200 From: Giorgos Keramidas To: Steven Petmecky Cc: freebsd-questions@FreeBSD.ORG Subject: Re: How to Configure Sendmail 8.11+ for Backup MX Message-ID: <20011110002725.GA487@hades.hell.gr> References: <20011107132853.B7624@nubisci.net> <20011107231359.J301@blossom.cjclark.org> <20011109133729.A21217@nubisci.net> <006901c16957$7a638be0$1eabcecf@accessus.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <006901c16957$7a638be0$1eabcecf@accessus.net> User-Agent: Mutt/1.3.23.1i Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Steven Petmecky wrote: > Does anyone have a link to a good resource for building a sendmail 8.11 or 8.12 > mailserver, on FreeBSD 4.X, to serve as a purely backup MX for several domains? > > Also, information on using something like RBL or ORBZ to block spam, and > keeping the server from being an open-relay? > > I've looked over the FAQ's and documentation at sendmail.org, and did not find > anything specific to building a backup mailserver properly. Well, apart from configuring your DNS servers to have an MX pointer for the domain you want point to the Sendmail running machine, there's not much you need to set up. If your Sendmail server is not set up to reject mail for the domain in question, and the MX records are correctly configured, and you don't make the mistake of trying local delivery of the domain in question, you should be ready to fly :) So there are just two steps you need to take: a) Configure your name servers to have an MX record with larger priority that points to the secondary mail server. b) Make sure that your secondary Sendmail does not have in /etc/mail/local-host-names (or whatever you call it) the name of the domain that it's secondary MX for. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message