[cumbria_lug] POP3 proxy

[Russ]

Hi,

At work we have a Linux server, which has got ClamAV[1] installed. I 
would like to use this box as a proxy for all incoming e-mail, so that 
Clam can scan the incoming e-mails for viruses. However, I don't want to 
set it up as a full-blown mail server, I just want incoming mails to go 
through the server first.

I'd like to set up a POP3 proxy running on the server, which will allow 
Clam to scan all mails for viruses before allowing them into our 
network. I found P3Scan[2], which is a development of pop3vscan[3], and 
it is *almost* what I want. The downside is that both these work as 
transparent proxies, and have to run on the router, but we have an ADSL 
router.

So, my question is this. Can anyone tell me where I can get an 
open-source POP3 proxy that will allow me to use ClamAV to scan e-mails 
for viruses? Or, failing that, can anyone tell me how to set up iptables 
on the Linux server so that all Internet access from the Windows clients 
goes through the Linux server?

Russ

[1] http://www.clamav.net/
[2] http://p3scan.sourceforge.net/
[3] http://pop3vscan.sourceforge.net/