Date: Sat, 07 Apr 2007 14:32:56 +1000 From: Mikhail Goriachev <mikhailg@webanoide.org> To: Derek Ragona <derek@computinginnovations.com> Cc: Jonathan Horne <jhorne@dfwlp.org>, freebsd-questions@freebsd.org Subject: Re: slightly OT - my freebsd email topology Message-ID: <46171EF8.2060009@webanoide.org> In-Reply-To: <6.0.0.22.2.20070405131910.024eedd8@mail.computinginnovations.com> References: <56576.192.168.125.142.1175794565.squirrel@webmail.dfwlp.org> <6.0.0.22.2.20070405131910.024eedd8@mail.computinginnovations.com>
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Derek Ragona wrote: > At 12:36 PM 4/5/2007, 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? >> >> does anyone have any setups that are similar to this, and could advise me or >> point me in the right direction? >> >> thanks, >> jonathan > > > Generally you want to filter and bounce mail at the point of origin, so > your mail server that first accepts the mail. As long as you have the > bandwidth on that server you would spam check, virus check there, bouncing > any bad ones. Then forward to your internal server only clean mail for > delivery. Bounces generate backscatters. The idea is to filter and *reject* (instead of bouncing) at the point of origin. Regards, Mikhail. -- Mikhail Goriachev Webanoide Telephone: +61 (0)3 62252501 Mobile Phone: +61 (0)4 38255158 E-Mail: mikhailg@webanoide.org Web: www.webanoide.org
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