I have used the T.37 on-ramp faxing before for clients, but never used the wildcards to make it easier on myself (or I thought). Has anyone implemented this using the '$d$' wildcard to send fax-emails to the server?
According to this and the traces that I have seen you have to create email accounts with 'FAX=xxxxxxxxxx' where the x's notate your incoming dialed number (could be 10 or less digits). But the point is that my client says that he cannot use the '=' character in an email alias. Has anyone found a way around this?