mail:~/bin # MailScanner --lint
Trying to setlogsock(unix)

Reading configuration file /etc/MailScanner/MailScanner.conf
Reading configuration file /etc/MailScanner/conf.d/README
Read 1082 hostnames from the phishing whitelist
Read 3416 hostnames from the phishing blacklists

Checking version numbers...
Version number in MailScanner.conf (4.84.6) is correct.

Your envelope_sender_header in spam.assassin.prefs.conf is correct.
MailScanner setting GID to  (51)
MailScanner setting UID to  (51)

Checking for SpamAssassin errors (if you use it)...
Using SpamAssassin results cache
Connected to SpamAssassin cache database
SpamAssassin reported no errors.
Connected to Processing Attempts Database
Created Processing Attempts Database successfully
There are 29 messages in the Processing Attempts Database
Using locktype = posix
MailScanner.conf says "Virus Scanners = f-secure clamav"
Found these virus scanners installed: clamav, f-secure
===========================================================================
Filename Checks: Windows/DOS Executable (1 eicar.com)
Other Checks: Found 1 problems
Virus and Content Scanning: Starting
Virus Scanning: F-Secure found virus EICAR_Test_File
./1/eicar.com: Infected: EICAR_Test_File [FSE]
Virus Scanning: F-Secure found virus EICAR-Test-File (not a virus)
./1/eicar.com: Infected: EICAR-Test-File (not a virus) [Aquarius]
Virus Scanning: F-Secure found 1 infections
./1/eicar.com: Eicar-Test-Signature FOUND

Virus Scanning: ClamAV found 2 infections
Infected message 1 came from 10.1.1.1
Virus Scanning: Found 3 viruses
===========================================================================
Virus Scanner test reports:
F-Secure said "./1/eicar.com: Infected: EICAR_Test_File [FSE]"
F-Secure said "./1/eicar.com: Infected: EICAR-Test-File (not a virus) [Aquarius]"
ClamAV said "eicar.com contains Eicar-Test-Signature"

If any of your virus scanners (clamav,f-secure)
are not listed there, you should check that they are installed correctly
and that MailScanner is finding them correctly via its virus.scanners.conf.