Not your e-mail, NO-IP let you use DDNS in your PC, for this, you need login into your NO-IP account creat a name, e.g: myroserver.biz.
After this, enter in NO-IP aplication on your PC, select the host in this example: myroserver.biz, and everyone who try acess myroserver.biz will be redirect yo your PC.
In client side part switch the IP to DDNS name(myroserver.biz) and try to connect.
3 Important things:
1-)Open your router/firewall/Windows ports, make a rule to everybody who try to acess your WAN IP in ragnarok ports be redirect to your PC.
2-)Make sure your internet provider doens't block reverse IP connections, when this is blocked you acess your PC by the Internet IP, in my contry have a company which provider of internet that block this.
3-)You've said 2 IPs ? You have a loadbalancer ?
Regarding the firewall and ports, it's all right, as I said before with my WAN IP inserted in char.conf and map.conf files I can connect normally, only when I use my NO-IP that is not connecting (myroserver.biz) the two ip's that said are the two places that I insert my public IP in char.conf and map.conf files.
The application of NO-IP is properly installed and I am logged in to my account.
My NO-IP is working, I can answer when PING using any PC the internet.
But when I insert my NO-IP (myroserver.biz) in char.conf and map.conf files, I can not connect to my server.