Emacs: Set mail-user-agent to mu4e.

init.d/misc/email.el

@@ -1,6 +1,6 @@
 ;;; email.el --- Email setup                         -*- lexical-binding: t; -*-
 
-;; Time-stamp: <2020-03-28T02:08:49+0100>
+;; Time-stamp: <2020-03-28T12:09:08+0100>
 
 ;;; Commentary:
 
@@ -31,7 +31,8 @@
              (mu4e-view-html-plaintext-ratio-heuristic most-positive-fixnum)
              (mu4e-attachment-dir "~/Downloads")
              (mu4e-compose-signature-auto-include nil)
-             (mu4e-user-agent-string nil))
+             (mu4e-user-agent-string nil)
+             (mail-user-agent #'mu4e-user-agent))
     :config (progn
               (defun mu4e~headers-jump-to-maildir ()
                 "Overload that uses ivy."