I have a cable modem connection through which I host an Exchange Server. My conneciton IP address is served to me through DHCP which, for the most part, remains static. My domain is registered with Network Solutions and for my MX record I'm using dyndns.org as a pointer. This works great right now but to make it work I had to statically map a number of A records within Network Solutions to my current DHCP address. Obvisiously this will cause a problem and a loss of email when my IP address changes and I have to wait for DNS to catch up. Is there a way around chaning the static records everytime my IP changes?