Keep getting Bounce message when using Gmail API - node.js

Question

I try to use gmail API to send emails form node application. Here is my code:
function sendEmail(auth) {
var gmail = google.gmail('v1');
gmail.users.messages.send({
auth,
userId: 'me',
resource: {
payload: {
mimeType: 'message/rfc822',
headers: [{name: 'To', value: 'ayeritsian#gmail.com'},
{name: 'Subject', value: 'test'},
{name: 'From', value: 'ayeressian2#gmail.com'}]
},
raw: new Buffer('test123').toString('base64')
},
internalDate: Date.now()
}, function (err, bla, IncommingMessage) {
console.log(arguments);
console.log('end');
});
}
When I run the application I keep getting bounce messages "An error occurred. Your message was not sent.". The error message is not descriptive enough and there is almost no documentation for google-api node package. I will appreciate it if someone can help me out.

Answer 1

You need to put the entire email in the "raw" field on the message, the parsed-out message doesn't work with send. c.f. https://developers.google.com/gmail/api/guides/sending
this is something akin to python, i'm sure you can translate to node.js :)
email = "From: myemail#gmail.com\r\nTo: someguy#gmail.com\r\nSubject: hey check this out\r\n\r\nhi someguy, this is my email body here. it's plain text."
message.raw = base64_websafe(email)

Answer 2

For what it's worth I had a similar issue to yours. I kept getting a vague error message in the inbox of my app/user.
From: nobody#gmail.com
An error occurred. Your message was not sent.
What resolved the issue for me was adding the Message-ID property to the Buffer I created. Basically, my message wasn't composed to the rfc822 spec that they mention in the docs here. 😁
Here is the document I referenced and below is my snippet.
module.exports = function (policyMeta) {
log.info('BUILDING EMAIL');
const message = 'From: xxx#xxx.com\r\n' +
'To: xxx#xxx.com\r\n' +
`Date: ${new Date()}\r\n` +
'Subject: Howdy Mundo\r\n' +
`Message-ID: ${uuid()}\r\n` +
'look mom i send a message';
const params = {
auth: Auth.getGoogleAuthClient(),
userId: 'me',
media: { mimeType: 'message/rfc822' },
resource: {
raw: new Buffer(message).toString('base64')
}
};
return sendEmail(params).then((res) => console.log(res, '🔥🔥success🔥🔥'));
};