One other command worth noting is M-x mh-version. Since there
were a few changes in command letters between Versions 3 and 4, use
this command to see which version you are running. This command didn't
exist before Version 4, so the message `[No match]
'
indicates that it's time to upgrade (see Getting mh-e). In the
meantime, use the older commands that are listed in Changes to mh-e. The output of M-x mh-version should also be included with
any bug report you send (see Bug Reports).