1) First export the new customer from the list in CleverReach as soon as a customer subscribed in a subscription form.
This is the Rest API call:
2) Now import this email address as well as the individual voucher code with this Rest API call:
The individual voucher code has to be imported in a specific data field.
3) Create a THEA campaign that starts with the subscription event.
4) Insert the flow control "delay"
5) Create the newsletter and insert in the email the data field with the voucher code.
6) Every recipient of the email will see then the voucher code.
Here is an image about the structure of the THEA campaign: