Please bare with me as I am no where near an expert in FreePBX and I am learning about it every day.
We have PRI lines that come Ethernet into two FreePBX servers (PBX1 and PBX4). I would compare these to voice gateways in the Cisco world. We also have a third FreePBX server that serves mainly as the configuration system for our FreePBX install (PBX). I would compare this to a Call Manager in the Cisco world.
Our Telco provides us a set of fax numbers over one of the PRIs. (i.e. 123-456-7890). When a fax is made to one of those numbers, the fax is actually created as an e-mail and sent to an Active Directory distribution list which has an e-mail address example of firstname.lastname@example.org. Notice how the e-mail address is the last three digits of the fax number.
We have implemented a new SMTP relay server in our environment and shut down the old one. Not thinking about this fax creation using SMTP to create those e-mails, we broke the Fax to E-mail. We had to turn the old SMTP server back on. We have searched everywhere in all three FreePBX servers (PBX1, PBX4, and PBX) and are unable to find the location where this configuration is to hand these off to Active Directory. We did a Wireshark capture on the the old SMTP server while sending a fax and we did see where the relay (Port 25) was coming from PBX1 (one of the PRI connected devices).
Any help that anyone could give me around this would be greatly appreciated. We want to change the FreePBX config to point to the new SMTP relay server.