7.1.4 Overlapping events

         Overlapping events are fully supported by the Mailer.

         Event B starts at 05:00 with a duration of 01:00. Event A
         starts at 05:01 with a duration of 00:15. The behavior for
         event A includes Only execute event once and End event when
         no more mail to send.

         Event B will start at 05:00, after one minute, event A will
         start and last for fifteen minutes (or end when there is no
         more mail to send).

         Once event A has ended, B will resume. This is a very
         powerful and useful concept. It can be used to start
         temporary or dynamic events within events that lasts for
         several hours.