Date: Thu, 05 Apr 2007 18:42:15 +0100 From: Howard Jones <howie@thingy.com> To: Jonathan Horne <jhorne@dfwlp.org> Cc: freebsd-questions@freebsd.org Subject: Re: [freebsd-questions] slightly OT - my freebsd email topology Message-ID: <461534F7.4050206@thingy.com> In-Reply-To: <56576.192.168.125.142.1175794565.squirrel@webmail.dfwlp.org> References: <56576.192.168.125.142.1175794565.squirrel@webmail.dfwlp.org>
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Jonathan Horne wrote: > currently, my email server is just a single box, accepting and sending emails > from and to the internet. spamassassin and sendmail, and so far, it works > satisfactory. > > i would like to change it up, so that i have a pair of servers doing MX from the > internet, which then passes to an internal server for delivery. if i do that, i > could remove spamassassin from the internal server, and run it on just the 2 > external. all those configurations is really not my issue here... what im > really pondering is how would external servers that are seperate from where the > target mailboxes are, know which addressess are acceptable and which to return a > 550? > I did this for our backup MX using qpsmtpd and a plugin I wrote to check against an automatically updated file. qpsmtpd can deliver onwards to any SMTP server after running whatever filtering/fussiness you specify. I believe there is a milter plugin that can do onward queries before accepting mail, too, although I don't use sendmail, so I couldn't tell you the name of it...
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