From owner-freebsd-questions@FreeBSD.ORG Tue Aug 26 04:33:55 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 09BD2106569C for ; Tue, 26 Aug 2008 04:33:55 +0000 (UTC) (envelope-from fbsd06+ZF=40860cea@mlists.homeunix.com) Received: from fallback-in1.mxes.net (fallback-out1.mxes.net [216.86.168.190]) by mx1.freebsd.org (Postfix) with ESMTP id C10868FC08 for ; Tue, 26 Aug 2008 04:33:54 +0000 (UTC) (envelope-from fbsd06+ZF=40860cea@mlists.homeunix.com) Received: from mxout-03.mxes.net (mxout-03.mxes.net [216.86.168.178]) by fallback-in1.mxes.net (Postfix) with ESMTP id C9CD3163DE1 for ; Tue, 26 Aug 2008 00:17:27 -0400 (EDT) Received: from gumby.homeunix.com. (unknown [87.81.140.128]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.mxes.net (Postfix) with ESMTP id 6542C23E496 for ; Tue, 26 Aug 2008 00:17:25 -0400 (EDT) Date: Tue, 26 Aug 2008 05:17:21 +0100 From: RW To: freebsd-questions@freebsd.org Message-ID: <20080826051721.02baa3bb@gumby.homeunix.com.> In-Reply-To: <48B24804.9080807@infracaninophile.co.uk> References: <20080824140625.txre8xer6s0ggwww@webmail.secureserverdot.com> <60071053-118B-47FD-A988-40A18A88D576@goldmark.org> <48B24804.9080807@infracaninophile.co.uk> X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.11; i386-portbld-freebsd7.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: MTA advice ?? 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: Tue, 26 Aug 2008 04:33:55 -0000 On Mon, 25 Aug 2008 06:49:56 +0100 Matthew Seaman wrote: > Jeffrey Goldberg wrote: > > > > Receiving mail directly will be more possible, but tricky. You > > will need to use a dynamic DNS system. Also do consider uptime and > > reliability. In the old days, if one MTA couldn't reach another it > > would hold stuff in its queue for four or five days. Now, most > > MTAs appear to be configured to give up after 24 hours. So if your > > mailserver is down for a day, mail will be bounced and never > > delivered to you. > > In which case those mail systems are not in compliance with the RFCs. > > RFC 2821 Section 4.5.4.1 says: > > Retries continue until the message is transmitted or the sender > gives up; the give-up time generally needs to be at least 4-5 days. > The parameters to the retry algorithm MUST be configurable. > > ie. 4-5 days is the /minimum/ time to hold messages in the queue and > keep retrying. It doesn't say that. The only concrete requirement there is the last sentence about the retry algorithm, the rest is just friendly advice. There are cheap backup services that will avoid this kind of problem though.