It seems like it would be a simple thing to both forward my email, and save a copy of it in the home directory. That's what I'm used to doing with other email hosts - the mail gets sent to another address and kept in the original box as well.
Oh, and I'm not sure what an alias is, really, but I'm thinking that I probably don't need an alias, I just want to be able to have all my various emails sent to one central location for simplicity's sake. But I don't want to lose another week's worth of email because it wasn't backed up before it was forwarded. Know what I mean?
I could just use my gmail account for all my email (because gmail backs up all their servers), but that doesn't seem very professional, and seems like a waste to have my own domain for my business but not be able to feel secure using it for email...