Unlocking Outlook’s Blocked Content

Outlook has this lovely tendency to lock out certain file types from entering your mailbox. This is a fantastic security feature, providing you aren’t ever planning on receiving executable files (.exe), registry entries (.reg) or Access databases (.mdb) via your mail. If you need a certain file type unblocked, read on!

1. Click on the ‘Start’ button and select ‘Run’. Type ‘regedit’ in the text box and click ‘OK’.
2. Browse to HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security (The ‘10.0′ will differ according to your version of Office. Eg. it will be 9.0 for Office 2000 SP3 and 11.0 for Office 2003)
3. Add a new string value named “Level1Remove” into the Security subkey.
4. For the value of Level1Remove, enter a semicolon-delimited list of file extensions. For example, entering .mdb;.urlas your string value would unblock Microsoft Access files and Internet shortcuts. Note that the use of a leading dot was not a requirement back in the day, however, new security patches may require it. If you are using “mdb;url” format and extensions are blocked, add a dot to each extension. Another thing, please do not put any spaces in anywhere. This will not work too well at all with spaces.
5. Close and re-open Outlook. All changes should now be in effect.

Just a subtle warning, some content is blocked for a reason, so use this hack with severe caution!