From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 04F6F138350 for ; Mon, 6 Apr 2020 15:51:44 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 06F17E0F18; Mon, 6 Apr 2020 15:51:38 +0000 (UTC) Received: from mail-wr1-x436.google.com (mail-wr1-x436.google.com [IPv6:2a00:1450:4864:20::436]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id B683AE0EEE for ; Mon, 6 Apr 2020 15:51:37 +0000 (UTC) Received: by mail-wr1-x436.google.com with SMTP id h15so18072852wrx.9 for ; Mon, 06 Apr 2020 08:51:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=robbieab-com.20150623.gappssmtp.com; s=20150623; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:in-reply-to:to; bh=bGgPkhwZ75Z3fXiDV4M+g9ltAwHBAqbd2534+Tlp+VM=; b=2DgkYM1SLZqg8lf+ihcNqcKNqUvmzE/vSWM2uXv+NUmgUNPm/RmEz4yQYADdIBYrnZ DUwhnWDEgMR698tLU9DFEkpmC8h4OaATjn/EMj5I1CWfbI4oclbM6KtAGjQ19tIOCt1O w6wzvn37Sb/EDb9eM3WEZpAHRfe0WOYUGPl+W7iknrQYZnHK2iyPIxdBVErKaQmGbTr2 +i/d27lwo7gVPVw78vMoFF/b6Flv/9PCYe47fO+oTwbypDlo6xANdH5dDb2mY8XCgmjt VhGHvr5IbOOyT/kM0XJVwW8ub4SsT9Xz+V4d4laJWqd+nZSJferBgREyiIm8f01EuANr Abbg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:in-reply-to:to; bh=bGgPkhwZ75Z3fXiDV4M+g9ltAwHBAqbd2534+Tlp+VM=; b=pf4mW5pKEGcr/JZq4CWZ3HnI2Ygm5NdmXJI+rP6pnlbzEuT9yTAwDWywDlkdEDAxFD 1EKik8xq5OwqgING0SuWG26WmhCXPHdZKqzpP+sQ9QizKViQyAisy397u1AmIfSG1K61 BGp3+6afCNhouuxL8p82luDSYHh9875BsikYpDQGOVXJNYQ0xGnjdJzevJ2YSejKVxN4 tnKSkb3JVyX6pT453DCl+qN0/cb3pPBmzHb7bFaSnMtEZtOHuKthZFbVmvfUd5iktavu oqR/63/famC9Tfh3deGAcqkNz7foYhfINVDxDIEsM+Lz5C5Y5or1W0eQQC+ol1LBBCLL M9DA== X-Gm-Message-State: AGi0PuZbHI5aQdEYIJmd8r/4mWbS4JDopWMZCwh0wWiBaKRNptPN88mL KBoJYOqKWTig0PoKm1GiSCma6Bk201s= X-Google-Smtp-Source: APiQypKWX3z+BK+BDTICzTU2nZ2/uEMDqRAafQQ4hPJ0r3OU/FTqa3t3lhJeIiXaSDp+0cgDvakX4A== X-Received: by 2002:a5d:4988:: with SMTP id r8mr5381542wrq.248.1586188296135; Mon, 06 Apr 2020 08:51:36 -0700 (PDT) Received: from [192.168.1.127] ([84.68.23.60]) by smtp.gmail.com with ESMTPSA id t26sm24673wmj.12.2020.04.06.08.51.35 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 06 Apr 2020 08:51:35 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Robert Bridge Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply Mime-Version: 1.0 (1.0) Subject: Re: [gentoo-user] Alternate Incoming Mail Server Date: Mon, 6 Apr 2020 16:51:34 +0100 Message-Id: References: <20200406153445.yzeewcorrb7vjtni@ad-gentoo-main> In-Reply-To: <20200406153445.yzeewcorrb7vjtni@ad-gentoo-main> To: gentoo-user@lists.gentoo.org X-Mailer: iPhone Mail (17D50) X-Archives-Salt: 277fb3eb-4774-414f-bce5-442711dd1094 X-Archives-Hash: 8acfe5a3e01398ecbf337eaf46b6f27b On 6 Apr 2020, at 16:35, Ashley Dixon wrote: >=20 > =EF=BB=BFOn Mon, Apr 06, 2020 at 05:24:03PM +0200, J. Roeleveld wrote: >> You'd need to install a SMTP server on the backup system and configure it= to >> relay emails to your primary mailserver. >>=20 >> In the DNS you can configure priorities in the MX entries. >=20 > Hi, cheers for your response, however as Michael pointed out, such a serve= r > would be unnecessary. I wasn't aware of the S.M.T.P.\ standard which manda= tes > M.T.A.s retry for four or five days, and given that my server won't be dow= n for > longer than a few minutes, I think I'm going to stick with a single MX. It is still commonly considered good practice to have a secondary MX server.= I have encountered some DNS control panels which actually refuse to allow y= ou to only configure a single MX record! Why trust another party to correctly handle your email when your main system= is offline?=