Here's what I use to eliminate trash on my personal incoming mail. (I
run NetBSD; I'm not likely to find .exe's useful...)
MIMEINFO=`/usr/pkg/bin/reformime -i`
:0
* MIMEINFO ?? ^content-name:.+[~.](asd|bat|chm|cmd|com|dll|exe|hlp|hta|js|jse|lnk|ocx|pif|scr|shb|shm|shs|vb|vbe|vbs|vbx|vxd|wsf|wsh)$
/dev/null
No warranties, expressed or implied.
--Steve Bellovin, http://www.research.att.com/~smb