Ecf extension is associated with Outlook Add-in file. You can try to open ecf files with Outlook application.

Outlook is a Microsoft product email control and sending software. If you have Office package on your computer, probably Outlook was installed automatically. You can open these kind of files with the softwares similar to Microsoft Office. 
If you make the necessary settings, you may check your email without entering the web page with Outlook. Ecf files are used for adding new and different features to Outlook. 

What to use ecf

Outlook or free alternatives

which page related to ecf file

ecf Related Searches

You can check related links about ecf fileextension.