I often receive diff files (*.diff) as attachments, as part of our team workflow, and need to view them. To do so, I double-click the attachment to open it in an external viewer program.
Outlook always prompts me to confirm whether I want to open these files. I do. However, the checkbox is disabled, so I cannot uncheck it.
Is there a way to disable these prompts for only the *.diff file type? I don't mind having it prompt me for other file types.
I looked through all the settings in Outlook but couldn't find a place to configure this.
Using MS Outlook 2013 / Windows 7.