(setq gnus-secondary-select-methods '((nnml "private")))
Then split into groups with:
(setq nnmail-split-methods
'(("mail.neijia" "^Sender: owner-neijia@lists.Stanford.EDU")
("mail.tw2k" "^Reply-To: twilight2000@MPGN.COM")
("mail.personal" "")
))
and expire with:
(setq gnus-auto-expirable-newsgroups "mail\\..*")
Use R.
W v
W w
gnus-interactive-catchup
t means catchup requires confirmation
gnus-interactive-exit
t means quit requires confirmation