FaxBack NET SatisFAXtion 8.7 (Including R3) - Manual - Manual (Page 115)

2 – Server Administration NET SatisFAXtion 8.7 Manual 115
Click Next.
Now add the Address Space that this connector will handle. This will be the Fax
Server's SMTP Domain Name that you entered when installing the SMTP Gate-
way.
Click the Add button and enter the address space, then click OK. The address
space will show up in the list in the Domain column.
Click Next.
Now add the smart host that will handle this domain. Click Add and enter the IP
address of the fax server, then click OK. Do not enter your Exchange server's
IP address as that will create a mail loop.