Re: real time content filtering - is there hope?

[Rodney Richison <rodney@rcrcomputing.com>]

Andy Smith wrote:

> On Thu, May 25, 2006 at 09:30:48AM -0500, Rodney Richison wrote:
>  
>
> > Is there any hope at all for real-time spam/virus filtering using
> > postfix or exim? Everything I find says low volume sites only.. 
> >    
>
> Where "low volume" is still quite a generous number of emails/day on
> modern hardware..
>
>  
>
> > Just wondering.  It would be nice...
> >    
>
> How many emails are you expecting?  You can do what you want with
> exim, making callouts to spamd and clamav for example, you'll just
> need a little bit more hardware than you would if you were accepting
> the mail and then scanning it later.
>  
I'm about as "low volume" as you could get compared to you guys. Total 
of only about 3000 emails a day. Of course, I'm not including those 
rejected outright already using rbls, etc. which would just about double 
that for a total connection attempts of 6000 daily.

> There's no such thing as a free lunch and content filtering is the
> most expensive part of accepting an email.
For my volume, I wonder where I might find some suggested hardware 
requirements. I'm currently running raid1-scsi dual 700mhz 1-gig ram

>  If you want to do it
> during the SMTP conversation then this is going to slow down the
> rate at which you can accept and deal with mails, but it's probably
> still worth it.
>  
The benifit I percieve might be to "tighten" down the settings a bit.