Having difficulty setting up nodemailer to connect with Gmail using oAuth2 authentication

I recently followed a tutorial on setting up nodemailer with gmail, which can be found here.

Here is how my transporter is configured:

const transportObj = {
  host: 'smtp.gmail.com',
  port: 465,
  secure: true,
  auth: {
    type: "OAuth2",
    user: "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="fc918599919d9590bc9b919d9590d29f9391">[email protected]</a>",
    clientId: "xxxxxxxxxxx.apps.googleusercontent.com",
    clientSecret: "xxxxxxxx",
    refreshToken: "xxxxxxxxx",
    accessToken: "xxxxxxxxxxxxxxx"
  }
};

Unfortunately, when I try to create the transporter using this configuration:

let transporter = nodemailer.createTransport(transportObj);

I encounter the following error:

TS2769: No overload matches this call.
  The last overload gave the following error.
    Argument of type'{ host: string; port: number; secure: boolean; auth: { type: string; user: string; serviceClient: string; privateKey: string; accessToken: string; }; }' is not assignable to parameter of type 'Transport | TransportOptions'.
      Type '{ host: string; port: number; secure: boolean; auth: { type: string; user: string; serviceClient: string; privateKey: string; accessToken: string; }; }' has no properties in common with type 'TransportOptions'.

467         transporter = nodemailer.createTransport(transportObj);

Even though my transport object aligns with examples in the nodemailer documentation, I'm at a loss for what else to attempt.

Could the use of firebase cloud functions be contributing to this issue?

javascripttypescriptsmtpgmailnodemailer

Answer №1

Resolved by modifying the import statement to

import * as nodemailer from 'nodemailer';

and changing it to

const nodemailer = require('nodemailer');

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