Mailgun - 401 forbidden

Question

I try to send a email message by using mailgun. I use node.js (nest.js) and this is my mail service. What should I change? When I try to send first email (description in mailgun official website) I got the same error message.

import { Injectable } from '@nestjs/common';
import * as Mailgun from 'mailgun-js';
import { IMailGunData } from './interfaces/mail.interface';
import { ConfigService } from '../config/config.service';

@Injectable()
export class MailService {
  private mg: Mailgun.Mailgun;

  constructor(private readonly configService: ConfigService) {
    this.mg = Mailgun({
      apiKey: this.configService.get('MAILGUN_API_KEY'),
      domain: this.configService.get('MAILGUN_API_DOMAIN'),
    });
  }

  send(data: IMailGunData): Promise<Mailgun.messages.SendResponse> {
    console.log(data);
    console.log(this.mg);
    return new Promise((res, rej) => {
      this.mg.messages().send(data, function (error, body) {
        if (error) {
          console.log(error);
          rej(error);
        }
        res(body);
      });
    });
  }
}

When I try to send message I get 401 error with forbidden description.

My mg (console.log(this.mg))

Mailgun {
  username: 'api',
  apiKey: '920d6161ca860e7b84d9de75e14exxx-xxx-xxx',
  publicApiKey: undefined,
  domain: 'lokalne-dobrodziejstwa.pl',
  auth: 'api:920d6161ca860e7b84d9de75e14exxx-xxx-xxx',
  mute: false,
  timeout: undefined,
  host: 'api.mailgun.net',
  endpoint: '/v3',
  protocol: 'https:',
  port: 443,
  retry: 1,
  testMode: undefined,
  testModeLogger: undefined,
  options: {
    host: 'api.mailgun.net',
    endpoint: '/v3',
    protocol: 'https:',
    port: 443,
    auth: 'api:920d6161ca860e7b84d9de75e14exxx-xxx-xxx',
    proxy: undefined,
    timeout: undefined,
    retry: 1,
    testMode: undefined,
    testModeLogger: undefined
  },
  mailgunTokens: {}
}

My email body

{
  from: '[email protected]',
  to: '[email protected]',
  subject: 'Verify User',
  html: '\n' +
    '                <h3>Hello [email protected]!</h3>\n' +
    '            '
}

Answer 1

I had this problem when my domain was in an EU zone. When you're using an EU zone, you have to specify it in the config - this isn't clearly explained by Mailgun.

So it would be something like this:

var mailgun = require("mailgun-js")({
  apiKey: API_KEY,
  domain: DOMAIN,
  host: "api.eu.mailgun.net",
});