+Convenient footnotes in =message-mode=.
+
+#+begin_src emacs-lisp
+(use-package footnote
+ :after message
+ :bind
+ (:map message-mode-map
+ :prefix-map amin--footnote-prefix-map
+ :prefix "C-c f"
+ ("a" . footnote-add-footnote)
+ ("b" . footnote-back-to-message)
+ ("c" . footnote-cycle-style)
+ ("d" . footnote-delete-footnote)
+ ("g" . footnote-goto-footnote)
+ ("r" . footnote-renumber-footnotes)
+ ("s" . footnote-set-style))
+ :config
+ (setq footnote-start-tag ""
+ footnote-end-tag ""
+ footnote-style 'unicode))
+#+end_src
+
+** supercite
+
+#+begin_src emacs-lisp :tangle no
+(use-package supercite
+ :commands sc-cite-original
+ :init
+ (add-hook 'mail-citation-hook 'sc-cite-original)
+
+ (defun sc-remove-existing-signature ()
+ (save-excursion
+ (goto-char (region-beginning))
+ (when (re-search-forward message-signature-separator (region-end) t)
+ (delete-region (match-beginning 0) (region-end)))))
+
+ (add-hook 'mail-citation-hook 'sc-remove-existing-signature)
+
+ (defun sc-remove-if-not-mailing-list ()
+ (unless (assoc "list-id" sc-mail-info)
+ (setq attribution sc-default-attribution
+ citation (concat sc-citation-delimiter
+ sc-citation-separator))))
+
+ (add-hook 'sc-attribs-postselect-hook 'sc-remove-if-not-mailing-list)
+
+ :config
+ (defun sc-fill-if-different (&optional prefix)
+ "Fill the region bounded by `sc-fill-begin' and point.
+Only fill if optional PREFIX is different than
+`sc-fill-line-prefix'. If `sc-auto-fill-region-p' is nil, do not
+fill region. If PREFIX is not supplied, initialize fill
+variables. This is useful for a regi `begin' frame-entry."
+ (if (not prefix)
+ (setq sc-fill-line-prefix ""
+ sc-fill-begin (line-beginning-position))
+ (if (and sc-auto-fill-region-p
+ (not (string= prefix sc-fill-line-prefix)))
+ (let ((fill-prefix sc-fill-line-prefix))
+ (unless (or (string= fill-prefix "")
+ (save-excursion
+ (goto-char sc-fill-begin)
+ (or (looking-at ">+ +")
+ (< (length
+ (buffer-substring (point)
+ (line-end-position)))
+ 65))))
+ (fill-region sc-fill-begin (line-beginning-position)))
+ (setq sc-fill-line-prefix prefix
+ sc-fill-begin (line-beginning-position)))))
+nil))
+#+end_src
+
+** COMMENT gnus-alias :ARCHIVE:
+
+#+begin_src emacs-lisp
+(use-package gnus-alias
+ :commands (gnus-alias-determine-identity
+ gnus-alias-select-identity)
+ :bind (:map message-mode-map
+ ("s-i" . gnus-alias-select-identity))
+ :config
+ (setq
+ gnus-alias-default-identity "amin"
+ gnus-alias-identity-alist
+ '(("amin"
+ nil ;; Does not refer to any other identity
+ "Amin Bandali <amin@aminb.org>"
+ nil ;; Organization
+ nil ;; extra headers
+ nil ;; extra body text
+ nil) ;; signature file
+ ("gnu"
+ nil
+ "Amin Bandali <bandali@gnu.org>"
+ nil
+ nil
+ nil
+ nil)
+ ("uw"
+ nil
+ "Amin Bandali <abandali@uwaterloo.ca>"
+ nil
+ (("Gcc" . "\"nnimap+uwaterloo:Sent Items\""))
+ nil
+ nil))
+ gnus-alias-identity-rules
+ '(("amin" ("Delivered-To" "<amin\\@aminb\\.org" both) "amin")
+ ("gnu" ("Delivered-To" "<gnu\\@aminb\\.org" both) "gnu")
+ ("uw" ("any" "<\\(.+\\)\\@uwaterloo\\.ca" both) "uw"))
+ gnus-alias-override-user-mail-address t)
+ :hook (message-setup . gnus-alias-determine-identity))
+#+end_src
+
+** COMMENT [[https://notmuchmail.org][notmuch]] :ARCHIVE:
+
+See [[notmuch:id:87muuqsvci.fsf@fencepost.gnu.org][bug follow-up]].
+
+#+begin_src emacs-lisp