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| Definition | : | Electronic Fax |
| Category | : | Computing » File Extensions |
| Country/ Region |
: | Worldwide
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| Popularity | : |
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An .EFX file extension is an acronym for Electronic Fax (eFax) . eFax is an Electronic Fax Document image file format used to send faxes electronically via computer. The E-FAX program was originally used by developers such as J2 Global Communications and Everex to send fax messages via email.
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The full form of EFX is Electronic Fax