From owner-freebsd-hackers Sat Jul 22 16:28:38 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.11/8.6.6) id QAA09098 for hackers-outgoing; Sat, 22 Jul 1995 16:28:38 -0700 Received: from ibp.ibp.fr (ibp.ibp.fr [132.227.60.30]) by freefall.cdrom.com (8.6.11/8.6.6) with ESMTP id QAA09090 for ; Sat, 22 Jul 1995 16:28:36 -0700 Received: from blaise.ibp.fr (blaise.ibp.fr [132.227.60.1]) by ibp.ibp.fr (8.6.12/jtpda-5.0) with ESMTP id BAA09003 ; Sun, 23 Jul 1995 01:28:34 +0200 Received: from (roberto@localhost) by blaise.ibp.fr (8.6.12/jtpda-5.0) id BAA26114 ; Sun, 23 Jul 1995 01:28:27 +0200 From: roberto@blaise.ibp.fr (Ollivier Robert) Message-Id: <199507222328.BAA26114@blaise.ibp.fr> Subject: Re: MX records and sendmail To: nc@ai.net (Network Coordinator) Date: Sun, 23 Jul 1995 01:28:27 +0200 (MET DST) Cc: nate@trout.sri.MT.net, hackers@FreeBSD.org In-Reply-To: from "Network Coordinator" at Jul 22, 95 04:41:01 pm X-Operating-System: FreeBSD 2.2-CURRENT ctm#880 X-Mailer: ELM [version 2.4 PL24] Content-Type: text Content-Length: 889 Sender: hackers-owner@FreeBSD.org Precedence: bulk > in the DNS entry, what will happen is B will freak out trying to send > back to itself on the MX try. Site B is the best site for A, it should > try A directly. What will happen is the mail will be held in B's queue > until A comes back online. Not all sendmail will react like this. This not the default behaviour for sendmail 8.x : # if we are the best MX host for a site, try it directly instead of config err #O TryNullMXList > What might work for you otherwise is: > > Site A MX 5 Site A > MX 10 Site B > > so B will try to send the mail to A if it can. Though setting Ow to True > works over here. You are not conform to the RFC if you do so (even if a lot of people does this anyway). The double MX is somewhat cleaner. -- Ollivier ROBERT -=- The daemon is FREE! -=- roberto@FreeBSD.ORG FreeBSD 2.2-CURRENT #5: Fri Jul 14 12:28:04 MET DST 1995