Outlook by default blocks certain attachments (file-types) from being
viewed for security reasons. Once blocked the file cannot be
'un-quarantined' and it can be more useful to disable the blocking at
the client-level and establish filtering at another level.
To disable blocking on a per-extension basis:
Locate the following registry key, where
is your version of Outlook:
Create a new string key called \"Level1Remove\" and add the extnsion(s)
you wish to allow; seperating them with commas. Outlook will need to be
restarted for the changes made to take effect.
### See Also
[Attachments blocked by