VitalPBX External Email Server Port 25 Blocked

VitalPBX
1

Hi

I am trying to configure VitalPBX to use exchange online via a connector. I have followed the Microsoft instructions and got everything configured but when doing a test email the connection to Exchange is timing out.

I logged into the CLI and installed / ran a telnet to the exchnage online address and it fails to connects, however it works fine from my laptop.

I have also tried another email server which i could connect to from my laptop, again via the CLI it fails.

Any ideas?

I have the pbx hosted on Azure which has port 25 open by default for outbound, i have also put in any / any outbound rule and gave it priroity so i dont believe anything on the Azure side is blocking it.

Thanks
Rob

2

Since posting this I’ve found that Microsoft block port 25 for all VMs on certain subscriptions. I’m now looking at using Azure communication services to achieve this

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