Email NodeJS cannot send

Question

I want to send an email from NodeJs. I did a quick search on npmjs.org and found 2 promising libraries:

and

First, I followed the instructions to install and run NodeMailer, but It does not work. I wanted to send email from Gmail, thus, I enabled the "less secured" apps and also enabled captcha as suggested in the documentation of Nodemailer. However, even though I did this I could not make it work.

In addition, I tried to switch to my University's email, so I found its SMTP server and Port and configured the settings. The error persisted, mainly:

(node:825) UnhandledPromiseRejectionWarning: Unhandled promise rejection
(rejection id: 1): Error: connect EAGAIN 134.91.56.35:587 - Local (0.0.0.0:58442)
(node:825) [DEP0018] DeprecationWarning: Unhandled promise rejections are 
deprecated. In the future, promise rejections that are not handled will 
terminate the Node.js process with a non-zero exit code.

I am not exactly sure how to fix it, so I tried the next client, EmailJs. The error there is:

{ Error: connection encountered an error (connect EAGAIN 134.91.56.35:587 ...
code: 5,
previous: ...
... smtp: undefied}

I can clearly see that it is written that smtp is undefined, but I have verified that it is the same.

To clarify, I am running NodeJs on Bash on Windows, but since I know there are some issues with it I also run the code on a Raspberry PI 3.

Thank you!

AGoranov · Accepted Answer · 2017-12-18T08:02:45.457

I managed to configure it.

As suggested I used Gmail-node. To do this you have to follow some steps:

First, install it using npm install gmail-node
Open link https://console.developers.google.com/flows/enableapi?apiid=gmail
Use this wizard to create or select a project in the Google Developers Console and automatically turn on the API.
Click Continue, then Go to credentials.
At the top of the page, select the OAuth consent screen tab. Select an Email address, enter a Product name if not already set, and click the Save button.
Select the Credentials tab, click the Create credentials button and select OAuth client ID.
Select the application type Other, enter the any name "gmail-node-app", and click the Create button.
Click OK to dismiss the resulting dialog.
Click the file_download (Download JSON) button to the right of the client ID.
Move this file to your working directory and use it with any name like client_secret.json.

Now your program would look like this where you have to change the information in accordance to the file you just downloaded:

var gmailNode = require('gmail-node');
var clientSecret = {
    installed: {
        client_id: "k677725446467-6li25pcqgkcllsoh6f6dijcvse64n9pf.apps.googleusercontent.com",
        project_id: "clean-node-129606",
        auth_uri: "https://accounts.google.com/o/oauth2/auth",
        token_uri: "https://accounts.google.com/o/oauth2/token",
        auth_provider_x509_cert_url: "https://www.googleapis.com/oauth2/v1/certs",
        client_secret: "kF7DvoA_ZrNfa65GnU2zQBgw7",
        redirect_uris: [
            "urn:ietf:wg:oauth:2.0:oob",
            "http://localhost"
        ]
    }
};
gmailNode.init(clientSecret, './token.json', function(err,data){ ... });

However, after taking this from the website, I still had an unknown problem, namely Error: No access or refresh token is set..

In order to solve it, you need to generate url with a "TokenURL" by log this code:

console.log(gmailNode.generateUrl(clientSecret));

Follow the generated URL and copy the "TokenURL" there.

Lastly, send an email with:

gmailNode.generateToken(clientSecret, tokenURL, (err, data) => {
        gmailNode.sendWithToken(emailMessage, clientSecret, data, function(err,data) {
                console.log(err, data)
        })
})

And you are done!

Note that we don't need init anymore.

Email NodeJS cannot send

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