// either html or text is required, both can be set
"html": "<h1>Hello in HTML!</h1>",
"text": "Hi there in plain text",
"subject": "Happy new year",
do SMTP(hostname) // mandatory
.auth(username, password) // optional, defaults to no auth
.tls(true) // optional, defaults to auto upgrade to TLS if available
.port(465) // optional, defaults to 465
.send(email) // perform the send request