EM Antiblock - Version 1.1.0 The Outlook E-Mail Software has an integrated security feature that blocks access to .exe, .com and other "dangerous" files. You cannot open these files from Outlook, nor can you use Outlook to save them to your system. If you don't like this security feature of Outlook, just use EM Antiblock to activate these kinds of attachments agin. And the best of all: This software is freeware!