We had an announcement from one of our customers this morning that they have changed their ISP.
They access email externally using POP3.
We lock down both SMTP and POP3 by IP address.
They supplied us with the new IP address and I have added this to the Connection Control on the POP3 Virtual Server and I have added it to the Relay and Connection Control on the SMTP Virtual Server.
I've then restarted both services.
However, they can only receive email and not send.
When testing the account settings, POP3 authenticates correctly, but it then fails to send the test message because it cannot connect to the SMTP service.
Have I missed anything?
I have tested the account on a device that connects via an already added IP address and it works as expected.
I'm really rather confused and I'm hoping I've just forgotten to add the IP address to somewhere else.
Any help would be most appreciated.