The EFX file format is created by the eFax program, which is available in a range of versions.
eFax is used to send and receive faxes via emails, attaching them to he email message. The EFX files can be converted into PDF or TIF files using the eFax Messenger program.
.efx File Extension
Developer:
j2 Global Communications
File category:
What are efx files & how to open them - Everex Efax Fax Document File
File category:
Developer:
j2 Global Communications