The ClamAV milter is a high performance before-queue milter meaning you are able to reject infected mails in the incoming SMTP stage before they are accepted by the mail server.
Milter (short for mail filter) is an extension to the widely used open source mail transfer agent Postfix. It allows administrators to add mail filters for filtering spam or viruses in the mail-processing chain. More information about Postfix milters can be found here: http://www.postfix.org/MILTER_README.html
||Configuration file for ClamAV milter on Centos 7 / RHEL 7|
||Configuration file for ClamAV milter on Centos 6 / RHEL 6|
||Configuration file for ClamAV milter on Debian / Ubuntu|