Amavisd and dualscan virus scanner ?

[A. Schulze]

Olivier CALVANO:

> 2016 Jan 28 05:27:52 scan-srv4 amavis[2280]: Found secondary av scanner
> Sophos Anti Virus (savscan) at /opt/sophos-av/bin/savscan

amavis "know" primary and secondary scanner.
Primary scanner are considered fast and are prefered.
Secondary scanner are used only in cases ALL primary scanner fail.

So your sophos installation ist not detected by amavis in the right way.
Have a look in amavisd.conf. There are two arrays "@av_scanners = ()"  
and @av_scanners_backup = ()
both with lots of comments.

Check your sophos run as daemon an provide a unix socket like  
/var/run/savdi/sssp.sock

Andreas