Encrypted attachment blocks, but not for 7z.

[L.P.H. van Belle]

Hai, 

Anyone any tip how to findout why an encrypted 7z file made it through mailscanner. 
By default im blocking encrypted attachments, it works fine with zip's or rar files only 7z not. 

Any suggestions? I cant find anything here why this happend. 

Im running : 
Debian GNU/Linux 9.9 (stretch) 
mailscanner 5.1.3-2


Greetz, 

Louis