+Optionally check for missing attachements in outgoing messages (see
+function `notmuch-mua-attachment-check`).
+
+Bind `B` to browse URLs in current message.
+
+Bind `g` to refresh the current notmuch buffer.
+
+Editing a message as new now includes an FCC header.
+
+Forwarded messages are now tagged as +forwarded (customizable).
+
+Add references header to link forwarded message to thread of original
+message.
+