get https://na.connect.etherfax.net/rest/3.0/api/inbox?a=list
Returns a list of unread faxes for the given account. All faxes are returned as FaxReceive child nodes in the response. The optional {count} value may be specified to limit the number of unread faxes returned in the list. Setting this value to 0 (or omitted) returns all unread faxes. This function only returns the information associated with the received fax and not the actual fax image data.