GNUS: How to automatically mark archived articles read?

[Lei Wang]

Hi all!

I use gnus as my email client. And use archive as this

(setq gnus-message-archive-method
      '(nnfolder "archive"
                 (nnfolder-inhibit-expiry t)
                 (nnfolder-directory "~/.mail/archive")
                 (nnfolder-active-file "~/.mail/archive/active"))
      gnus-update-message-archive-method nil)
(setq gnus-message-archive-group
      '(("emacs" "sentto-emacs")
        ("sawfish" "sentto-sawfish")
        (".*" "sentto-outbox")))

When i send an email, it was archived into a proper group, but its state
is unreaded. I don't want to read it again, then how to mark it read
automatically?

-- 
Regards
Lei