We have a FreePBX connected to a Sangoma SBC, which is in turn connected to a Sipgate SIP trunk. SIP trunk is registered, and we can make inbound calls through the SBC to FreePBX and answer them with audio.
When trying to make outbound calls, Sipgate is rejecting them with a ‘403 Forbidden (check from field)’. Looking at the from field I can see it is from email@example.com:5060 I believe it should be MY-SIPGATE-USER-ID@sipconnect.sipgate.com:5060. But I don’t seem to be able to make this happen.