Change it in the properties of your Internet email account... but you would
have had to set a new one up anyway since you'd be collecting mail from a
different POP3 (incoming mail) server. Did you do that?

Hi - I suspect you're new to newsgroups - please note that you should never
type in all caps. It's difficult to read and is considered "shouting." In
addition, don't put a valid email address in a newsgroup post, either, or
you'll get spam galore!

That said - you need to either modify the existing account you or someone
else already set up in Outlook, or set up a new one. You might call your ISP
for tech support on this, as nobody here is likely to know anything about
your particular account settings.

In general, in order to get help in here, we would need more information.
Much depends on your version of Outlook, etc.