my .gnus.el file

(require 'smtpmail)
(require 'pgg)

;; -------------------------------------------------------------
;; location awareness
(if (run-at-home)
    (setq user-mail-address "REDACTED")
  (setq user-mail-address "REDACTED"))

;; -------------------------------------------------------------
;; global settings
(setq user-full-name "REDACTED")
(setq-default gnus-asynchronous t)
(setq-default gnus-novice-user nil)
(setq-default gnus-use-cache t)
(setq-default message-mode-hook (quote (mail-text 
   turn-on-auto-fill turn-on-font-lock mail-text not-modified)))
(setq-default mm-inline-text-html-with-w3m-keymap t)
(setq-default mm-text-html-renderer (quote w3m))
(setq gnus-secondary-select-methods nil)
(setq gnus-summary-make-false-root 'dummy)
(setq display '[and (not killed) (not dormant) (not expire)])
(setq gnus-suppress-duplicates t)
(setq gnus-summary-ignore-duplicates t)
(setq nnmail-treat-duplicates 'delete)
(setq mm-discouraged-alternatives 
      (append mm-discouraged-alternatives 
              '("text/html" "text/richtext")))
;; no newsrc
(setq
 gnus-save-newsrc-file nil 
 gnus-read-newsrc-file nil 
 )

;; check email
(gnus-demon-add-handler 'gnus-group-get-new-news 1 t)
(gnus-demon-init)

;; pgg
(setq mm-verify-option 'known)
(setq mm-decrypt-option 'known)

;; saving sent messages
(setq gnus-message-archive-group
      '((if (message-news-p)
	    "nnml:Send-News"
	  "nnml:Send-Mail")))

(setq gnus-visible-headers
      '("^From" "^Subject" "^Date" "^To" "^Cc" "^User-Agent"))

;; -------------------------------------------------------------
;; mail macros and shortcuts
(fset 'gotogroup
   [?\C-x ?b ?* ?G ?r ?o ?u ?p ?* return])
(global-set-key (kbd "C-c m") 'gotogroup)

(fset 'purgemail
   [?\C-c ?s ?B backspace ?q ?g])

(global-set-key (kbd "C-c p") 'purgemail)
(global-set-key (kbd "C-c i") 'fmbiff)
(global-set-key (kbd "C-c s") 'gnus-uu-mark-all)

;; -------------------------------------------------------------
;; connect to imaps
;; dovecot

(if (not t) ;; may put some condition in later when can't use local dovecot
(setq gnus-select-method
      '(nnimap "Mail"
	       (nnimap-address "REDACTED")
               (nnimap-user "REDACTED")
	       (nnimap-stream ssl)
               (nnimap-expunge-on-close always)
               (nnimap-server-port 993)))
(setq gnus-select-method
      '(nnimap "Mail"
	       (nnimap-address "localhost")
               (nnimap-user "REDACTED")
	       (nnimap-stream ssl)
               (nnimap-expunge-on-close always)
               (nnimap-server-port 993))))


;; -------------------------------------------------------------
;; sending mail
(setq send-mail-function 'smtpmail-send-it)
(setq message-send-mail-function 'smtpmail-send-it)
(setq smtpmail-starttls-credentials
       '(("REDACTED" 25 nil nil)))
(setq smtpmail-smtp-server "REDACTED")
(setq smtpmail-default-smtp-server "REDACTED")

;; -------------------------------------------------------------
;; identity management

(setq gnus-posting-styles
      '(((header "to" "REDACTED")
	 (from (concat user-full-name " REDACTED"))
         (setq message-cite-reply-above nil))
	((header "to" "REDACTED")
	 (from (concat user-full-name " REDACTED"))
         (setq message-cite-reply-above nil))
        ((header "to" "REDACTED")
         (from (concat user-full-name " REDACTED"))
         (setq message-cite-reply-above 't))
	((header "to" "REDACTED")
	 (from (concat user-full-name " REDACTED"))
         (setq message-cite-reply-above nil))))

;; (setq nnmail-expiry-wait `immediate)

;; -------------------------------------------------------------
;; biff

(defvar foundnewmbox "")
(defun fmbiff ()
  (interactive)
  (save-excursion
    (set-buffer "*Group*")
    (beginning-of-buffer)
    (defvar foundanymbox nil)
    (cond ((re-search-forward "INBOX.in" nil t)
           (setq foundanymbox t))
          (t (setq foundanymbox nil)))
    (set-buffer "*Group*")
    (beginning-of-buffer)
    (cond ((re-search-forward "0: INBOX.in" nil t)
           (setq foundnewmbox ""))
          (t (if foundanymbox (setq foundnewmbox "[M]") 
               (setq foundnewmbox ""))))))

(unless (member 'foundnewmbox global-mode-string)
   (setq global-mode-string (append global-mode-string
                                    (list 'foundnewmbox))))

(add-hook 'gnus-after-getting-new-news-hook 'fmbiff)
(add-hook 'gnus-group-mode-hook 'fmbiff)

;; -------------------------------------------------------------
;; system overrides
(defcustom pgg-gpg-program "gpg2"
  "The GnuPG executable."
  :group 'pgg-gpg
  :type 'string)

;; override default attachment viewers - requires ~/.mailcap entry
(add-to-list 'mm-inline-media-tests
             '("application/pdf" mm-inline-text identity))
(add-to-list 'mm-attachment-override-types "application/pdf")
;;(add-to-list 'mm-automatic-display "application/pdf")
;;(add-to-list 'mm-automatic-external-display "application/pdf")