See if http://www.slipstick.com/outlook/esecup/getexe.htm helps.
People should not email mdb, exe, pif, etc - if OL doesn't block it, decent
antivirus software usually will. Have the sender zip the attachment or
rename the file, etc., and it is more likely to make it to the recipient. Or
upload the file to an FTP server or similar, and send the recipient a link.