well, thank to the input from this list clamonacc is now working. Unfortunately opening a file with the eicar test signature will not trigger a virusevent. If I execute the file myself I get an email with clamav.log attached, as it should. These are my versions of clamav: (Debian 10)

ii  clamav                          0.102.4+dfsg-0+deb10u1    
ii  clamav-base                     0.102.4+dfsg-0+deb10u1    
ii  clamav-daemon                   0.102.4+dfsg-0+deb10u1    
ii  clamav-freshclam                0.102.4+dfsg-0+deb10u1 
ii  clamdscan                       0.102.4+dfsg-0+deb10u1 
ii  libclamav9:amd64                0.102.4+dfsg-0+deb10u1    

Any suggestions how to fix this or maybe a recipe for a workaround?

Yours sincerely

Stefan