mutt and compact mail folders

Hello again SuSE friends I was wondering if I could compact mail folders with mutt, or if I compact them using kmail, will mutt still be able to use/read them.?? suse-linux-e is getting a little bit thick in megabytes. Why don't I just delete them?, what and quit show business? besides I'm a hopless packrat _!!_ Thanks for replies. John W Mislan