Is there a way to retrieve the message ID after sending a new message using the Gmail API?
function getMessageIdAfterSending(userId, email, callback) {
var base64EncodedEmail = btoa(email);
var request = gapi.client.gmail.users.messages.send({
'userId': userId,
'message': {
'raw': base64EncodedEmail
}
});
request.execute(callback);
}