Sendmail and spam/antivirus

[Jorge Biquez]

Hello all.

I have a small machine with Freebsd 7.3, it is running sendmail for a 
few email accounts.

I'd like to implement, the easiest and most secure way to do it since 
machine is on a remote place where I have not access, I'd like to 
implement a spam  filter and an antivirus. I installed from ports 
spamd but seems like it is not doing anything.
What would be your advice on what to install to have and anivirus and 
an anti spam in the server? Sendmail is working fine and there are 
just a few email accounts there so no need to change it, since some 
of the accounts have been "public" in the last years they are in LOT 
of spammers lists and the spam and messages with virus has increased 
a lot in the last weeks so if possible to filter some will help.
Thanks in advance.
Jorge Biquez