This is an addon plugin for order delivery date and time plugin, it automatically sends a reminder email to your customer regarding upcoming delivery or pickup for their order, you can configure in the plugin how much time before a reminder email should be sent.
E.g: if the user places a pickup order for 25th April 2020 3:00 PM
and you have set the reminder time to be 30 min
then the customer will receive and a reminder email on 25th April 2020 2:30 PM
Sending of the email are handled by the WordPress Cron, so there can be a delay in sending of email if your website does not have any visitor on that time so we recommend setting up a system Cron job in your hosting, so Cron can be run even when you don’t have any traffic on the site