The default mail send provider is just provided as an example. It doesnt need any environment parameters as it is just writing to screen
The Helsingborgs stad mail content provider is sending the mail through a proxy API.
To enable it, our environment should contain:
EMAIL_PROVIDER=helsingborg
EMAIL_PROXY_URL=<The fully qualified URL of the email proxy service>
EMAIL_PROXY_KEY=<The API key to use for the email proxy service>
EMAIL_SENDER_ADRESS=<The sending email address>
EMAIL_SENDER_NAME=<The readable name of the sender>