Introduction It’s been half a month that I’m gradually writing an Emacs package for notmuch email notification. Although it works fine so far, it misses an important feature which consists to display the subject and the sender name on the notification instead of merely saying “2 new messages since last refresh”. Fortunately, probably because the development of the notmuch Emacs frontend, notmuch can speak Lisp S-expression. Notmuch show To retrieve header from emails, we need the command notmuch show.