eml is not scanned for banned file extension

[Pascal Sudmeier]

Hello,

is it possible to configure amavis that it scans eml files for included 
files with banned extensions or MIME types?

I tested scanning of eml files with the eicar file and amavis puts the 
mail into quarantine.
But if the attached eml includes for example a file with the extension 
".exe" or ".bat" the mail won' t be moved to quarantine.

Kind regards
Pascal Sudmeier