(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