5 October, 2020

Mailtrap with symfony, testing emails has never been so easy

Luigi Laezza

Web Development

Today I would like to write about a service that we use daily during development and pre-production, Mailtrap.

Mailtrap is a fake SMTP server for development teams to test, view and share emails sent from the development and staging environments without spamming real customers.

Setting it up is very easy and for 1 inbox is also free. Simply hit the registration page, and head to the default inbox.

There you will see the inbox settings that can be used in your project. That’s it!

To make your job even easier, Mailtrap has a very useful Integration drop down that will show you how easy is to integrate to your framework of choice.

Here an example for Symfony 2/php:

Symfony 2.0 uses SwiftmailerBundle to send emails. You can find more information on how to send email on Symfony's website. To get started you need to modify app/config/config.yml and add the following:

swiftmailer:
  spool:     { type: memory }
  transport: smtp
  host:      mailtrap.io
  username:  xxxxxx
  password:  xxxxxx
  auth_mode: cram-md5
  port: 2525

And another example for WordPress:

You can configure WordPress SMTP by using this code:

function mailtrap($phpmailer) {
  $phpmailer->isSMTP();
  $phpmailer->Host = 'mailtrap.io';
  $phpmailer->SMTPAuth = true;
  $phpmailer->Port = 2525;
  $phpmailer->Username = 'xxxxx';
  $phpmailer->Password = 'xxxxx';
}

add_action('phpmailer_init', 'mailtrap');

Now every email sent out from your application will be “trapped” by Mailtrap for your convenience, without the need of creating tons of test emails.

Other cool features are API, Mail validity checks, and sharing your inbox with the rest of your team.

Thanks, Railsware for the excellent product.

Coding tips