Just set up Mail on my mac so that all my various AOL account mail is going there now.  I'd imagine that if I respond from there it will look as if I'm responding FROM AOL, yes?  And from now on, any mail that comes in will be saved and/or archived there.  Now, can you set it up so you're only seeing the most recent e-mails, not ones from ages ago?  Like a folder or something?