utbox allows you to add other email addresses that are authorised to use the account.The only thing I can't seem to see is the option for sending it with more than one email address, i.e. sometimes I might want to send a fax from my computer and sometimes my hubby will want to send a fax from his computer.
From what I can see, utbox and mbox are very similar, with the main difference being:
* utbox charges 14c per page rather than 18c for outgoing faxes (within Aus)
* utbox charges 14c per outgoing SMS rather than 15c (within Aus)
* mbox charges min $9.95 per month for the ability to receive incoming faxes - utbox charge no ongoing fee, just 5c per page to receive faxes, receiving SMS is free
* utbox outgoing credits expire in 12 months ($59.95), mbox credits last 18 months
I can't imagine many situations under which mbox would be price-competitive with utbox. When I saw that mbox credits last longer, I thought that was good for low-volume users... but you have to pay $9.95/m for the ability to receive incoming faxes!
I guess if you only need to send a low volume of outgoing faxes, and don't need to receive, mbox may be the go. But if you need incoming fax ability, I should think utbox has the price edge.