Postfix port number

I followed the directions on this page: <https://www.afp548.com/Articles/mail/postfix-sa.html&gt; for Spam and Virus Controls with Postfix on an XServe with OSX Server 10.3. I can get the mail to clamav, but I can’t seem to get it back to postfix. When all software is running, I can test clamav by telneting to port 10024 but I get no response when I try to telnet to port 10025 (postfix). My mail server is functioning normally, that is, when I comment the content_filter=smtp-amavis:[127.0.0.1]:10024 line from /etc/postfix/main.c (to get it to stop sending mail to clamav), everything works fine, but when I uncomment that line, mail goes into the netherworld. Do I have to do anything to postfix to get it to communicate over port 10025? Am I missing something obvious?

Thanks.