eFax Messenger® offers you the ability to import your contacts from a file stored on your computer or from an email program such as Microsoft Outlook.
Import Your Contacts to Your eFax Messenger Address Book
The instructions for importing contacts:
Note: Contacts added to your eFax Contacts list from within Message Center can not be viewed in eFax Messenger unless first exported to .csv and then imported to eFax Messenger.
*eFax Messenger is only compatible with Windows OS