Using Mailtrap

Validate your generated emails using Mailtrap

After creating an account on Mailtrap, you can create an inbox and get the SMTP credentials.

Send the generated emails to the Mailtrap inbox and validate them to check the spam score, email preview, and other details.

Also, you need nodemailer package to send emails.

usingMailtrap.ts

import nodemailer from 'nodemailer';

interface Auth {
  user: string;
  pass: string;
}

export interface MailtrapOptions {
  from: string;
  to: string;
  subject: string;
  HTMLEmail: string;
  textEmail?: string;
  auth: Auth;
}

export async function validateEmailUsingMailtrap({
  from,
  to,
  subject,
  HTMLEmail,
  textEmail,
  auth,
}: MailtrapOptions) {
  const transporter = nodemailer.createTransport({
    host: 'smtp.mailtrap.io',
    port: 2525,
    auth: {
      user: auth.user,
      pass: auth.pass,
    },
  });

  let info, error;

  try {
    const res = await transporter.sendMail({
      from: from,
      to: to,
      subject: subject,
      text: textEmail,
      html: HTMLEmail,
    });

    info = res;
  } catch (err) {
    console.log(err);
    error = err;
  }

  return { info, error };
}

Import the validateEmailUsingMailtrap function and pass the required parameters.

index.ts

import { validateEmailUsingMailtrap } from './usingMailtrap';

async function validate() {
  const { info, error } = await validateEmailUsingMailtrap({
    from: 'From email address',
    to: 'To email address',
    subject: 'Test Email',
    HTMLEmail: 'Generated HTML email',
    textEmail: 'Text version of the email',
    auth: {
      user: 'Mailtrap username',
      pass: 'Mailtrap password',
    },
  });

  if (error) {
    console.log(error);
  } else {
    console.log(info);
  }
}

validate();

This will help you to check the spam score and other details of the generated email before sending it to the actual recipients.