Hi,
I'm not sure if this is the right place... but I have made a patch for Simscan to perform extra scan commands, which can be put in an environment variable, to check the email and attachments.
The motivation for making this patch is the recent growth of spam/virus emails that contain a zip attachment enclosing an .exe file. I found no easy solution to this and decide to patch simscan.
The patch is put on git as a project. You can get everything here: https://github.com/bingtimren/simscan_extrascan. The patched code is straight forward and the script to block "exe in zip" is shown in the Usage document.
Hope this helps :)
Bing