Changing email address in Mail
I have to change my @virgin.net email address which I've been using for ages to a @gmail.com one. I'm unsure what will happen if I use the new Mail setup assistant on my iMac - will I then have access in Mail to the two accounts prior to me closing the old one? That would be great.
I also have mail set up on a MacBook which I use when travelling. Do I just do the same on that?
Any other tips gratefully received but please note I'm not great at this - no jargon please.
iMac, Mac OS X (10.6.8)