+
+ (setq gnus-extract-address-components
+ 'mail-extract-address-components)
+ ;; summary buffer
+ (setq gnus-summary-line-format "%U%R%z%I%(%[%-20,20f%]%) %s%-80= %11&user-date;\n")
+ (setq gnus-user-date-format-alist '(((gnus-seconds-today) . "%H:%M")
+ ((+ 86400 (gnus-seconds-today)) . "%a %H:%M")
+ (604800 . "%a, %b %-d")
+ (15778476 . "%b %-d")
+ (t . "%Y-%m-%d")))
+
+ (setq gnus-thread-sort-functions '((not gnus-thread-sort-by-number)))
+ (setq gnus-unread-mark ?\.)
+ (setq gnus-use-correct-string-widths t)
+
+ ;; thread
+ (setq gnus-thread-hide-subtree t)
+
+ ;; (with-eval-after-load 'gnus-summary-mode
+ ;; (define-key gnus-summary-mode-map (kbd "C-o") 'sd/hydra-window/body))
+
+ (add-hook 'gnus-summary-mode-hook (lambda ()
+ (define-key gnus-summary-mode-map (kbd "C-o") nil)))
+
+
+#+END_SRC
+
+** Windows layout
+See [[https://www.emacswiki.org/emacs/GnusWindowLayout][GnusWindowLayout]]
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (gnus-add-configuration
+ '(summary
+ (horizontal 1.0
+ (vertical 35
+ (group 1.0))
+ (vertical 1.0
+ (summary 1.0 poine)))))
+
+ (gnus-add-configuration
+ '(article
+ (horizontal 1.0
+ (vertical 35
+ (group 1.0))
+ (vertical 1.0
+ (summary 0.50 point)
+ (article 1.0)))))
+
+ (with-eval-after-load 'gnus-group-mode
+ (gnus-group-select-group "INBOX"))
+ ;; (add-hook 'gnus-group-mode-map (lambda ()
+ ;; (gnus-group-select-group "INBOX")))
+#+END_SRC
+
+* Mu4e
+Refer [[http://www.kirang.in/2014/11/13/emacs-as-email-client-with-offlineimap-and-mu4e-on-osx][emacs-as-email-client-with-offlineimap-and-mu4e-on-osx]]
+
+** OfflineImap - download all mails from IMAP into local directory, and keep in sync
+#+BEGIN_SRC sh :results output replace
+ # offline-imap
+ brew install offline-imap
+
+ cp /usr/local/etc/offlineimap.conf ~/.offlineimapr
+
+ #For the =offlineimap= config on mac, using =sslcacertfile= instead of =cert_fingerpring=. On Mac
+ sslcacertfile = /usr/local/etc/openssl/cert.pem
+#+END_SRC
+
+Then, run =offlineimap= to sync the mail
+
+** Mu - fast search, view mails and extract attachments.
+#+BEGIN_SRC sh
+ EMACS=/usr/local/bin/emacs brew install mu --with-emacs
+#+END_SRC
+
+Then, run =mu index --maildir=~/.Mail=
+
+** Mu4e - Emacs frontend of Mu
+config from [[http://www.kirang.in/2014/11/13/emacs-as-email-client-with-offlineimap-and-mu4e-on-osx/][emacs-as-email-client-with-offlineimap-and-mu4e-on-osx]]
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (require 'mu4e)
+ (setq mu4e-maildir "~/.Mail")
+ (setq mu4e-drafts-folder "/[Gmail].Drafts")
+ (setq mu4e-sent-folder "/[Gmail].Sent Mail")
+ ;; don't save message to Sent Messages, Gmail/IMAP takes care of this
+ (setq mu4e-sent-messages-behavior 'delete)
+ ;; allow for updating mail using 'U' in the main view:
+ (setq mu4e-get-mail-command "offlineimap")
+
+ ;; shortcuts
+ (setq mu4e-maildir-shortcuts
+ '( ("/INBOX" . ?i)
+ ("/[Gmail].Sent Mail" . ?s)))
+
+ ;; something about ourselves
+ (setq
+ user-mail-address "seudut@gmail.com"
+ user-full-name "Peng Li"
+ mu4e-compose-signature
+ (concat
+ "Thanks,\n"
+ "Peng\n"))
+
+ ;; show images
+ (setq mu4e-show-images t)
+
+ ;; use imagemagick, if available
+ (when (fboundp 'imagemagick-register-types)
+ (imagemagick-register-types))
+
+ ;; convert html emails properly
+ ;; Possible options:
+ ;; - html2text -utf8 -width 72
+ ;; - textutil -stdin -format html -convert txt -stdout
+ ;; - html2markdown | grep -v ' _place_holder;' (Requires html2text pypi)
+ ;; - w3m -dump -cols 80 -T text/html
+ ;; - view in browser (provided below)
+ (setq mu4e-html2text-command "textutil -stdin -format html -convert txt -stdout")
+
+ ;; spell check
+ (add-hook 'mu4e-compose-mode-hook
+ (defun my-do-compose-stuff ()
+ "My settings for message composition."
+ (set-fill-column 72)
+ (flyspell-mode)))
+
+ ;; add option to view html message in a browser
+ ;; `aV` in view to activate
+ (add-to-list 'mu4e-view-actions
+ '("ViewInBrowser" . mu4e-action-view-in-browser) t)
+
+ ;; fetch mail every 10 mins
+ (setq mu4e-update-interval 600)
+#+END_SRC
+
+** Smtp - send mail
+- =gnutls=, depends on =gnutls=, first confirm this is installed, otherwise, =brew install gnutls=
+- =~/.authinfo=
+#+BEGIN_SRC fundamental
+ machine smtp.gmail.com login <gmail username> password <gmail password>
+#+END_SRC
+- OPTIONAL, encrypt the =~/.authinfo= file
+#+BEGIN_SRC sh :results output replace
+ gpg --output ~/.authinfo.gpg --symmetric ~/.authinfo
+#+END_SRC
+
+* Ediff