I just wanted to post that if anyone is having a problem getting eFax Messenger 4.4 to install into WINE 1.5.25 as I did , and you have an eFax Free account, which provides your faxes in .efx format, you can email eFax Customer Support and request that they change your default fax receipt format from .efx to .tif. Then you'll be able to open your faxes with practically any document viewer that you're using in Ubuntu, and you won't need to install eFax Messenger 4.4!
Bookmarks