From: Oskar Teran (pheonix1tepione.org)
Date: Wed Jul 11 2007 - 22:26:49 CDT

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Jay Chandler wrote:
> Howdy.
>
> I'm at a bit of a crossroads at this point in time-- I've crossposted
> this message to a few places where those far more knowledgeable than I
> are wont to hide.
>
> I've been tasked with rearchitecting the mailsystem for our university.
> I did this once before; probably 9 months ago, since what passed before
> was truly no longer working.
>
> What we have right now is FreeBSD MX boxes running Postfix for an MTA
> that are screening email for RFC compliance, and against several DNSBLs
> (as well as "does this user exist in our LDAP directory?") -- anything
> that fails is rejected, anything that passes continues on. After that,
> we're running MailScanner on the messages, and tagging according to
> SpamAssassin (configured with sitewide rules because that's how
> MailScanner does things). From there, we deliver to the user's mbox
> (mounted over NFS, but I've managed to work out the locking issues).
> Dovecot serves the mbox to our Squirrelmail server, as well as to POP or
> IMAP users directly at their client of choice.
>
> I have a few problems with this setup. The first is user
> dissatisfaction. They want the ability to white and black list
> individual senders (and possibly domains), preferably as close to the
> beginning of the process as possible. Obviously I don't want one user's
> whitelisting of spammers.com to affect anyone but that particular user.
> As of now we have no individual white or black listing.
>
> The second is management-- I'm looking to convert to MailDir (to
> obliterate the last vestiges of the locking issues) and institute quotas.
> The third is upper management suggesting that we might look to move to
> an Exchange server for handling user accounts at some point in the
> future, and as much of the white and blacklisting functionality should
> continue to exist if users edit their .forward files to show a
> completely different system (such as Exchange. Ugh).
>
> Does anyone have any wisdom on this situation that they'd care to express?
>

http://www.maiamailguard.com/faq.php

Have you looked at this? I believe this can do what your users want.

good luck,

Oskar

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