David Nimon said:
Go to slovaktech.com and click on Products. Scroll down to Attachment
Options. This shareware program will do what you want (and more).
The Outlook add-in, Attachment Options, will only let you change which
filetypes are excluded from the remove/block list. It will not do what
the OP wants which was to unblock an .exe attachment based on who was
the sender. The easiest way to do that is to retrain that particular
sender. Have then rename the extension so theirfile.exe gets attached
at theirfile.exx and then you rename it back to theirfile.exe when you
save it. Or have that sender compress it into a .zip file and attach
that. Otherwise, changing the registry to not block .exe attachments
means they are unblocked for EVERYONE that sends you e-mail with an .exe
attachment.