A simple worker service with event bus proxy to send emails.
An email can be sent in the format:
{
"from": "from.email@address",
"to": ["[email protected]", "[email protected]"],
"cc": ["[email protected]", "[email protected]"],
"bcc": ["[email protected]", "[email protected]"],
"subject": "This is a subject",
"body": "This is a body",
"contentType": "text/plain"
}