So mail stopped this morning. Its been a while since I upgraded the virus checker and ClamAV stopped supporting the version that I was using. This halted delivery for some reason.
Upgrading ClamAV.
Uninstall
cd [oldinstalldir]
./configure
sudo make uninstall
Install
wget [newversion]
tar zxf [newversion]
cd [newversion]
./configure --with-user=[myvirususer]
make
sudo make install
ldconfig
Configure
sudo vi /usr/local/etc/clamd.conf
# comment out example
# use the same socket as before (/tmp/clamd)
User vscan
LocalSocket /tmp/clamd
sudo vi /usr/local/etc/freshclam.conf
# comment out example
Start up
sudo freshclam
sudo /etc/init.d/clamav start