Define how many days should pass between each overdue email. Once the due date passes, overdue emails send at this recurring interval. Number Input - Enter days between overdue sends (minimum 1 day) Default Value - 7 days if not configured (all overdue emails sent weekly) Example - Set to 3 to send overdue emails every 3 days: 3 days after due, 6 days after, 9 days after, etc. Flexibility - Can be any positive integer; no maximum limit Interaction with Limits - Interval determines spacing, but stopped by day or email count limits (see below) Set the maximum number of days after the invoice due date to continue sending overdue emails. Once this limit is reached, no more overdue emails are sent even if email count limit not reached. Number Input - Enter maximum days after due date (0 = no