dns question...

sorry guys, had to repost because still not clear on best solution.

in a nutshell... will be killing an old server that is still used by many
people and applications as a mail relay. my plan is this:

kill old server, add old server's IP address as a second IP address to a new

wouldnt that be the only thing i have to do? im thinking that for the
people/apps that use the IP to talk to the old server, this will continue to
function... and so will the people/apps that use the old name to communicate
to the server. am i missing anything?