Custom checkpoint email notification

Tell customers when an order reaches the first custom pre-shipment step — once per applied order.

What this feature does

The Email Notification switch is off by default and is linked to Notification → Custom Checkpoint Reached.
When enabled, BestTrack sends an email when the earliest configured custom checkpoint is reached.
Only one checkpoint email is sent per applied order; later custom checkpoints do not trigger another email.
After the first email is sent, reordering or deleting checkpoints does not cause another send.
The preview shows the checkpoint name and configured time; live sends replace order, customer and store variables with actual data.
The Order Track button opens the store tracking page, where the customer can query the shipment with the tracking number.