could anyone help me to integrate mailrelay API Notifications into s2member?
would like to send an automatic message to all buyers. I have asked to wp sharks and they have said me that there is a way to integrate manually.
I have s2member pro
the API url is this one https://mailrelay.com/es/api-documentation
I have read this https://s2member.com/kb-article/building-an-api-notification-handler-webhook/
but I have some questions? after creating that php file how can mailrelay get the information? does mailrelay need to work with transactional message?