[Dovecot] Dovecot as a email storage system

I was thinking about all the old email I have and don't want to get rid of and how much space it is taking on my mail server. The idea came to me to install Dovecot on a server at home then I could drop mail into I want to save. It doesn't need to receive mail except what that is moved to it.

Anyone see problems with doing this?

Thanks, Rod