Migrating users/passwords info from one Linux box to another

Hi, I am need to replace old e-mail server with new one, and somehow migrate user accounts (including passwords) from old machine to the new one. I am thinking about using YP server for this purpose. May be anyone knows better and simpler solution? Thanks in advance for any suggestion(s). ********************************************* * Best Regards --- Andrei Verovski * * Personal Home Page * http://snow.prohosting.com/guru4mac * Mac, Linux, DTP, Development, IT WEB Site *********************************************