Sometimes it is not convenient to wait for a certain time when you want to start your email campaign; e.g., in the night, in the weekend, or when you are busy doing something else. In this case, schedule your campaign for the date and time when it should be started — the sending will begin exactly as specified.
To enable scheduled sending, be sure to configure a special server scheduler (cron). The scheduler, if set up, will attempt to send the scheduled message starting from the specified date and time. Information on how to set up cron jobs is displayed in the Mailer app if they have never been executed before.
In Webasyst Cloud, you do not need to set up cron jobs — they are already running for all Cloud users.