Allow Needed Blocked Outlook Attachments
Microsoft Outlook by default will block a variety of file times from your email in order to try and protect you from downloading something you shouldn’t. But of course Microsoft always thinks they know what’s best for you and a lot of the time they are wrong! There may come a time when you need to have a certain type of file sent to you that Outlook considers bad and it will be blocked so you can’t download it.
One way around this is for the sender to change the extension of the file to something more acceptable like .txt or compress the file and send it as a zip file. File extensions tell Windows what programs are associated with what types of files. For example a .doc or .docx file is associated with Microsoft Word and tells Windows to use Word to open .doc or .docx files such as report.docx.
You most likely won’t have the string value that needs to be created so to create it make sure you are in the Security folder and you can right click in a blank spot and choose New > String Value and name the it Level1Remove. It is case sensitive so make sure you type it exactly as shown or copy and paste it from here.
Next you will double click on the new Level1Remove value to edit it and then enter the file extension including the “.” that you want to open in Outlook. So in our case you would enter .js. If you need to enter more than one file extension you can do that by separating them with a semicolon like this; .js;.bat;.cmd.
Now you can close the registry editor and restart Outlook if it was already opened and you should now see your attachment in the email.
If you aren't allowed to see the attachment then try rebooting your computer to force the registry change to take effect.