[emacs] Refactor my own mu4e settings into a shareable config bit

dot_doom.d/config.el.tmpl

@@ -215,6 +215,20 @@
             (cond
              ((mu4e-message-contact-field-matches msg :to "bascht.com") (cdr-safe (car-safe (mu4e-message-field msg :to))))
              (t user-mail-address)))))
+(after! mu4e
+  (setq
+   org-msg-signature (with-current-buffer (find-file-noselect "/home/bascht/.signature") (buffer-string))
+   mu4e-change-filenames-when-moving t
+   message-send-mail-function 'message-send-mail-with-sendmail
+   message-sendmail-extra-arguments '("--read-envelope-from")
+   message-sendmail-f-is-evil 't
+   mu4e-update-interval 600
+   mu4e-compose-complete-only-after "2016-01-01"
+   mu4e-compose-dont-reply-to-self 't
+   mu4e-compose-format-flowed t
+   mu4e-get-mail-command "mbsync -a"
+   mu4e-headers-include-related t
+   sendmail-program "msmtp"))
 
 ; Disable spell-fu-mode globally
 (remove-hook 'text-mode-hook #'spell-fu-mode)