=item B<Whentools.mailto> [I<~only_on_failure:true>]
[I<~from:from_address>] I<email_address> I<result>
-Send the result of the script by email to the given email address.
+This built-in post function sends the result of the script by email to
+the given email address.
If the optional C<~only_on_failure:true> flag is set, then it is only
sent out if the script failed.