From owner-freebsd-isp Sat Feb 2 2: 5:46 2002 Delivered-To: freebsd-isp@freebsd.org Received: from smtp.clifftop.net (machassociates-6.dsl.easynet.co.uk [217.204.162.182]) by hub.freebsd.org (Postfix) with ESMTP id 6DDD037B416 for ; Sat, 2 Feb 2002 02:05:40 -0800 (PST) Received: from sisko (frodo.shire.com [192.168.1.250]) (authenticated bits=0) by smtp.clifftop.net (8.12.2/8.12.2) with ESMTP id g12A5KNv051534; Sat, 2 Feb 2002 10:05:23 GMT From: "Danny Horne" To: "Richard Chew" , "Cristiano Deana" Cc: "Noah Davidson" , Subject: RE: Secondary MX Date: Sat, 2 Feb 2002 10:05:20 -0000 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) In-Reply-To: <5.1.0.14.2.20020202111358.01bd53d8@gomer.telstra.net> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Importance: Normal X-RAVMilter-Version: 8.3.0(snapshot 20010925) (odo.clifftop.net) Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org > -----Original Message----- > From: owner-freebsd-isp@FreeBSD.ORG > [mailto:owner-freebsd-isp@FreeBSD.ORG]On Behalf Of Richard Chew > Sent: Saturday 02 February 2002 12:17am > To: Cristiano Deana > Cc: Noah Davidson; freebsd-isp@FreeBSD.ORG > Subject: Re: Secondary MX > > At 02:52 PM 1/02/2002 +0100, Cristiano Deana wrote: > >Il giorno Wednesday 30 January 2002 18:03, Noah Davidson mi scriveva: > > > Our primary mailserver is sendmail 8.12.2. We have some > customers that > > > have their own mail servers. We want our secondary mail > server to queue > > > mail until their server comes up on line then deliver it. > >... > > > or how should this be done? > > > >echo "domain.i.wanto.queue.th.mail.com" >> /etc/mail/local-host-names > >killall -HUP sendmail > > > >finish > > But does this stop customer from relaying through your mail > server? I don't > think so, and if only a secondary MX service is being offered, > then ideally > you do not want your customers to relay mail through you secondary MX box. > > The way we have done it is to use the access file to control > which domains > we accept mail for but do not allow the customers to relay through our > secondary MX box. > > Thanks. > I'm sure that using local-host-names for a domain you're acting as secondary MX for will cause your mail server to try to deliver the mail locally, when it can't find the recipient locally it'll reject the mail with a 'user unknown' type of message. As Richard & I have stated, the only way to safely do this is through /etc/mail/access with - To:domain.com RELAY This will only allow relay _TO_ this domain, which is what you want a secondary MX to do. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.320 / Virus Database: 179 - Release Date: 30/01/02 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message