Email antivirus scanner

[alexander botov]

Hi to All!

Recently I installed Postfix mail server on my FreeBSD gateway . I want to
use an email antivirus scanner to prevent my users from bad attachments .
I would like to know is there any free solution to
Postfix+email_scanner+antivirus_program ? I know that DrWeb antivirus
suite from the ports works with Postfix but I must use a licensed version
. On the other hand F-Prot is completely free so its just a matter of
finding an appropriate email scanner

Any ideas ?