*.ace compressed files ignored, although they contained a *.exe virus.
I assume there are other compressed files as well.
I think it shouldn't be bad to be able to block compressed files if GFI is not able to read these files.
ace compression is currently not supported.
GFI MailEssentials supports a wide variety of compressed formats including zip, 7z, gzip, rar
AV engines on the other hand can support additional formats.
I suggest to enable a blocking file rule for ace.