I am switching from Mandrill to Sparkpost.
Having several problems:
* Connecting method is HTTP API. I have entered the API key and provided data in the overrides field. Strange the field from_email automatically changes back to my user name. So when I specify the correct sending domain it gets ignored.
* When I want to sent a test email I got the following debug info: "Could not instantiate mail function."
Any ideas how to move forward?
Matej