[PLUG] Re: [lug] Spam Filtering With Remote Access

Cooper Stevenson cooper at cooper.stevenson.name
Fri Jul 18 10:41:02 UTC 2003


Will,

You're the man!


-Coop

On Fri, 2003-07-18 at 10:35, Wil Cooley wrote:
> On Fri, 2003-07-18 at 10:02, Cooper Stevenson wrote:
> > Scott,
> > > 
> > > We're accomplishing the same with a slightly different setup:
> > > 
> > > postfix + amavisd + spamassasin + clamav + cyrus imapd
> 
> This is basically setup I use in my Mail Defender package: 
> http://nakedape.cc/r/maildefender, except that I use Sophos Anti-Virus
> and Sophie, a daemonized scanner, and amavisd-new.  You should also of
> course include any extra scanners that SpamAssassin can use, like Razor2
> and DCC.
> 
> > Right, but Cyrus's IMAP server, while very fast and scalable, does not
> > (to the best of my knowledge) allow an administrator to mount Samba
> > shares under it's IMAP namespace. Don't get me wrong, I love Cyrus but
> > it employs it's own indexing, making it a "black box" for server shares.
> > If you know a way to do this, I am all ears as I found Cyrus's IMAP
> > server very reliable and fast. 
> 
> You really don't want to use a network file system for mail storage,
> either for your MTA's spool or the client retrieval server.  If remote
> access is the purpose, you're much better off doing it the standard way
> with POP/IMAP/SMTP over SSL.  If scalability is the issue, the "Murder"
> component of Cyrus let's you transparently proxy to the appropriate
> host, letting you spread the load over multiple servers.  OTOH, I see no
> technical reason you couldn't put the IMAP spool on a network file
> server and mount it--you just have to live with the potential loss of
> mail due to the way network file systems work.
> 
> > > 
> > > Right now we have 2 forward facing mail relays that handle email for
> > > most all of campus.  These relays run amavisd which is sort of a
> > > container for all of these tools like spamassasin and clamav.  It allows
> > > you to quickly and easily modify your filtering tools without having to
> > > muck with Postfix.
> > 
> > Love Amavisd for virus scanning to protect Windows clients. Does Amavisd
> > let you call SpamAssassin during the MTA phase?
> 
> amavisd-new does.  It's a fork from the original amavisd which includes
> SpamAssassin scanning and has a number of other features no found in the
> original.  It's also be more actively developed. 
> http://www.ijs.si/software/amavisd/  The only downside is the
> hokey-sounding name.
> 
> > > 
> > > This summer we're switching to using lmtp to deliver to a Cyrus IMAP
> > > store for all 35,000 ONID accounts.  I'm just as curious as all of you
> > > are on how that is going to work ... :-)
> > 
> > :-) !!
> 
> I've never done an installation that large (though I'd love to), but I
> know there are some.  I know Eric Harrison et al at MESD uses Cyrus, and
> I'd guess they're approaching that scale.
> 
> Wil
-- 
--------------------------------------------------------------
| Cooper Stevenson        | Em: cooper at cooper.stevenson.name |
| Open Source Consultant  | Ph: 541.924.9434                 |
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