[sllug-members]: smtp server

[Lamont R. Peterson]

On Saturday 28 October 2006 15:21, rn wrote:
> On Saturday 28 October 2006 09:58, Joey Weaver wrote:
> <--snip-->
>
> > My first question - Is it possible to have an smtp server at our
> > corporate office set up so that all emails to specific email
> > addresses (our users at the central office) get forwarded to the
> > exchange server and all the other emails get forwarded to our email
> > archiving company? We currently have about 40 users at the central
> > location and about 40 users around Utah. This would keep me from
> > supporting about 40 users on the Exchange server as well as save us
> > cost with MS licensing.
> >
> > My second question - Anyone have any suggestions on some virus/spam
> > engines that I could run on the smtp server?
>
> I've been running a setup similar to this for the past several years
> using Postfix as the SMTP gateway, postgrey for greylisting, and
> amavisd-new with SpamAssassin, DCC, Razor2, Pyzor and ClamAV for mail
> filtering. Postfix is configured with transport mapping to handle where
> mail is sent.

Good list, just what I would recommend, though if you're not that paranoid, 
you could omit DCC, Razor2 and/or Pyzor.  However, since you'll be feeding 
some emails to Exchange, I would *highly* recommend including that full list.

> I have just recently upgraded my setup to Slackware 11.0 from Slackware
> 8.0. A guide for configuring Debian using the above mentioned
> applications can be found at this site:
>
> http://www200.pair.com/mecham/spam/spamfilter20060701.html

Another thing you might consider is to use LDAP for the user accounts.  That 
way, you could include an attribute that tells the mail server which MTA to 
forward (approved, clean, filtered, etc.) messages to (your non-MS servers or 
the Exchange system) on a per user basis.  Another advantage is that this 
would be centralized and would let you scale to tens of thousands of users 
(if you needed to in the future).  It's also very easy to set up and 
maintain.
-- 
Lamont R. Peterson <lpeterson at neverblock.com>
Co-Founder, CEO
NeverBlock, LLC [ http://www.NeverBlock.com/ ]
GPG Key fingerprint = B309 1D8D D70E 0738 0985  4B1E 917D 1B30 2A54 C820

-- 
Lamont R. Peterson <lamont at gurulabs.com>
Senior Instructor
Guru Labs, L.C. [ http://www.GuruLabs.com/ ]
GPG Key fingerprint: F98C E31A 5C4C 834A BCAB  8CB3 F980 6C97 DC0D D409
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