I always been using my own exchange server and I used the ddns option to forward emails, and this was possible because the router also supported the ddns feature.
Unfortunately I changed Internet provider and this new people (Tele2) are providing a very bad service and in addition to that they block my mac address so I am obbligeted to use their roter that doesn't have any ddns feature so I am not able to send anymore email I can only received.
Now I switched back the setting in the Exchange Server (Internet Mail smtp connector) to the option use dns to route each address space on this connector. Now I am not able to still send email and everrytime I sent an email I have delivery failure. Now I rember that some email they should reach their own destination even though I am not using a specific static WAN IP because as you know normal internet provider only gives you Dynamic WAN IP. In any case the WAN IP is always the same because I am still using ddns host the hold the same IP at all time.
My question is is there anyway that I could configure exchange on forwarding emails without the ddns option? I hope you understtod what I mean. Any questions are welcome