Notes about the EFA file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The EFA file type is primarily associated with 'Ecrypt' by Email Connection. EFA files are file archives containing encrypted, compressed financial documents. EFA files are sent by Email Connection to users who use the services of its customers. The .ECR file extension was used by versions prior to 2005.
Detailed information for file extension EFA:
File classification: Archive
Mime type: application/octet-stream
Other applications associated with file type EFA:
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.