Date: Wed, 06 Sep 2000 14:59:32 +0200 From: Len Conrad <lconrad@Go2France.com> To: freebsd-questions@freebsd.org Subject: Re: Secondary Sendmail server Message-ID: <4.3.2.7.2.20000906145231.03027390@mail.Go2France.com> In-Reply-To: <200009061353.AAA98558@mail.beyondtech.net>
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>just a quick question - could someone explain how to configure a >secondary email server - >is it just the MX record at least that, sure >or is it necessary to configure sendmail in the secondary server. With postfix (fast, and simpler to config the sendmail), when mail for an uknown domair arrives, postfix will query DNS to see if postfix's hostname is in the domain's MX list, if so postfix accepts the mail for relay and goes into it's standard MX delivery drill. Sort of a "smart MX" function. no maintenance of postfix required. Pb is, your postfix machine can be hijacked for MX backup by anybody who simply lists your postfix hostname in their MX records. The high maintenance but secure way is to list explicitly each domain to be MX-backed up in postfix's relay_domains.map file so the incoming mail gets accepted, and then list the next-hop hostname or ip in the postfix transport.map file. Len http://BIND8NT.MEIway.com: ISC BIND 8.2.2 p5 installable binary for NT4 http://IMGate.MEIway.com: Build free, hi-perf, anti-spam mail gateways To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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