+You may notice a few (three) compile warnings: they can be ignored.
+
+If send, post, and whom fail, the cause might be a \ in your username.
+To avoid this, either add a Signature profile entry (see the
+mh-profile(5) man page) or set/export your SIGNATURE environment
+variable. The value can be just the short form of your username, such
+as that displayed by "id -nu".
+