From owner-freebsd-questions@FreeBSD.ORG Sat Jun 25 20:18:06 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 31E1C16A41C for ; Sat, 25 Jun 2005 20:18:06 +0000 (GMT) (envelope-from lars+lister.freebsd@adventuras.no) Received: from mail.adventuras.no (mail.adventuras.no [194.63.250.215]) by mx1.FreeBSD.org (Postfix) with ESMTP id AF7E743D49 for ; Sat, 25 Jun 2005 20:18:05 +0000 (GMT) (envelope-from lars+lister.freebsd@adventuras.no) Received: from cm-84.118.177.041.chello.no (cm-84.118.177.041.chello.no [84.118.177.41]) (authenticated bits=0) by mail.adventuras.no (8.12.10/8.12.10) with ESMTP id j5PKHi5V004394 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO); Sat, 25 Jun 2005 22:17:49 +0200 Date: Sat, 25 Jun 2005 22:17:44 +0200 From: Lars Kristiansen To: Doug Lee Message-ID: <77DE858F106AC0B02EE08740@cm-84.118.177.041.chello.no> In-Reply-To: <20050625113819.GI950@kirk.dlee.org> References: <20050625113819.GI950@kirk.dlee.org> X-Mailer: Mulberry/3.1.6 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Adventuras-MailScanner-Information: Please contact the ISP for more information X-Adventuras: du kan filtrere etter AdvSpamScore over 5-10 X-Adventuras-SpamCheck: not spam, SpamAssassin (score=-5.074, required 6, autolearn=not spam, ALL_TRUSTED -3.30, AWL 0.82, BAYES_00 -2.60) X-MailScanner-From: lars+lister.freebsd@adventuras.no Cc: freebsd-questions@freebsd.org Subject: Re: Is this a safe way to multi-home a mail server? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 25 Jun 2005 20:18:06 -0000 > 1. Can I have both host IPs (one from each DSL net) as A records in > DNS for the mail server's name--e.g., > > mail.my.domain IN A 1.2.3.4 > mail.my.domain IN A 5.6.7.8 > > and expect mail to arrive at the machine regardless of which network > is working at any given time? (Part of the Might help with the first question: If you have two A records and someone tries to send mail to your mailserver, a random pick is performed and if it cannot connect, delivery fails and will be tried later with a new random choose between the A records. On the other hand, if you use two different hostnames with same priority in MX record it will choose one random and try the other if it fails. > 2. Is there a way, via routed or other means, -- Med vennlig hilsen Lars Kristiansen A D V E N T U R A S Tlf: 22 20 59 90 Fax: 22 20 59 91 lars@adventuras.no http://www.adventuras.no