TIP: Run a Free Scan for .EFX File Errors.
Document file created with eFax, a fax service.
These .EFX files are used by eFax to both send and receive faxes. If receiving a fax, an email is received to a user's email inbox with an attachment which contains the body of the fax. If sending a fax, the user attaches an .EFX file to an email and sends through to eFax - who then strip the attachment and send the fax to the number in the header.
 Windows |
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Additional extension information
| File type: |
Data |
| Popularity: |
 Widespread |
| Author: |
j2 Global Communications, Inc. |
| MIME type: | Not specified |
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