Runs on commit. Projects can enable it themselves by using `bzr
config' to set post_commit_to option for a branch. See `bzr help email'
(if you have the plugin installed) for other options.
+
+Note: if you have the bzr-email plugin installed locally, then when
+you commit to the Emacs repository it will also try to send a commit
+email from your local machine. If your machine is not configured to
+send external mail, this will just fail. In any case, you may prefer
+to either remove the plugin from your machine, or disable it for Emacs
+branches. You can do this either by editing branch.conf in your Emacs
+branches, to override the server setting (untested; not sure this
+works), or by adding an entry to ~/.bazaar/locations.conf:
+
+ [/path/to/emacs/bzr/*]
+ post_commit_to = False
+
+You have to use locations.conf rather than bazaar.conf because the
+latter has a lower priority than branch.conf.