I know this has been asked in the past but I couldn’t find a solution.
Our old router failed so we’ve replaced it with a new one. It is a NETGEAR DG834G. I have set it up exactly as the old one and our network browsing and internet is fine.
Our outgoing MS Exchange email is working as well, but we are unable to receive emails. When I first set it all up earlier today, we started to receive external emails (I logged onto my home email and sent an email to my work one and it was received straight away), but soon after this stopped, despite making no changes to the router settings at all.
I have entered firewall rules just as the old router had, so inbound traffic on port 25 is being allowed, and should be routing through to the internal IP of of Exchange server.
I’m stuck now and have no idea why this is not working. Can anybody help at all?