Clam AntiVirus is a GPL anti-virus toolkit for UNIX. The main purpose of this software is the integration with mail servers (attachment scanning). The package provides a flexible and scalable multi-threaded daemon, a command line scanner, and a tool for automatic updating via Internet. This build script should build a package that "just works" after install. You will need to specify a two-letter country code (such as "us") as an argument to the COUNTRY variable when running the build script (this will default to "us" if nothing is specified). For example: COUNTRY=nl ./clamav.SlackBuild The package contains a start/stop script: /etc/rc.d/rc.clamav. I would suggest calling this script from /etc/rc.d/rc.M just before Sendmail is started with code like: # Starting ClamAV daemons if [ -x /etc/rc.d/rc.clamav ]; then /etc/rc.d/rc.clamav start fi The start/stop script will start: clamd, freshclam and clamav-milter. ** ClamAV, Amavisd-new and SpamAssassin ** You might want to use amavisd-new to act as an intermediary between Sendmail and ClamAV (and possible SpamAssassin too). Amavisd-new can be downloaded at http://www.ijs.si/software/amavisd/ For clamd to be able to scan messages, when called by Amavisd-new, you must add "clamav" to the "amavis" group (provided that clamd.conf contains the "User clamav" directive), e.g. run: # usermod -G $(id -Gn clamav | tr ' ' ','),amavis clamav Be sure to enable "AllowSupplementaryGroups" in clamd.conf and restart clamd. Also, to enable Amavisd-new to scan ClamAV's log files and produce nice statistics, the reverse must be done too; add user "amavis" to the group "clamav" as follows: # usermod -G $(id -Gn amavis | tr ' ' ','),clamav amavis Add the rc.amavisd script to your /etc/rc.d/rc.M script between the start of clamav and sendmail, so that the relevant section looks like this: # Starting ClamAV daemon: if [ -x /etc/rc.d/rc.clamav ]; then /etc/rc.d/rc.clamav start fi # Starting Amavisd daemon: if [ -x /etc/rc.d/rc.amavisd ]; then /etc/rc.d/rc.amavisd start fi # Start the sendmail daemon: if [ -x /etc/rc.d/rc.sendmail ]; then . /etc/rc.d/rc.sendmail start fi