Problem: Configured overdue settings but no emails arriving after due date passes Verify Portal > Scheduled Emails shows mission as \"Active\" and type changed to \"Overdue\" Check that Daily Send Time is configured (should show as HH:MM) Ensure Send Interval is set to at least 1 day Verify Stop After (Days) and Stop After (Emails) aren't set to values that immediately stop sends Verify WordPress email is working (test with other plugins) Check that invoice is not marked as paid (paid invoices don't send overdue emails) Check WordPress error logs for mail delivery errors Verify Portal API client is configured in Portal settings Problem: Overdue emails stopped before reaching configured limits Verify both Stop After (Days) and Stop After (Emails) settings - whichever limit is lower will