NutshellMail will deliver your Updates within a +/-10 minute delivery window from the delivery hour you have set. This delivery window is necessary in order to process all users scheduled to receive an update for a given time period. Although you may not receive your update on the exact hour, your updates should arrive at a relatively consistent time on a daily basis. In addition, messages can be delayed by your messaging provider; any discrepancy between the sent time and received time for a given message is out of NutshellMail's control.