[ILUG-BOM] pop3 arguments

in mail #775, abhir joshi had described some of the pop3 arguments (e.g. USER, PASS, LIST, DELE, QUIT) that cud b passed 2 the pop3 server 2 delete mails directly from the server w/o d'loading them. i tried the above cmds with my email service provider, the LIST cmd shows only the mail no. & size. i also checked some of the RFCs for pop3, but none of them gave me any cmds that i cud use. i wud like 2 learn about more such cmds & some sites/ books where i cud get some info about them. i actually want 2 write my own pop3/smtp based email client as my software engg project. any help regarding the pop3 & smtp cmds wud b greatly appreciated.

thanx!