This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

MailerSend – Official SMTP Integration


WordPress hosting companies are not optimized for high-volume email sending, which may result in some of your emails not getting delivered. MailerSend’s dedicated SMTP server will ensure that your forms, account notifications, e-commerce orders, and other transactional emails get delivered. By using this official SMTP plugin, you will:
* Improve your email deliverability
* Protect your domain reputation
* Learn more about your recipients


Improve inbox performance and ensure a smooth customer experience by letting MailerSend take care of email sending. After a decade of email delivery experience, MailerSend’s deliverability experts understand what it takes to avoid spam filters, stay off blocklists and lower bounce rates.

Domain reputation

Keep your domain reputation safe with MailerSend’s email authentication practices. Give your customers the confidence that they’re interacting with an established brand, and let MailerSend manage the emails that could potentially damage your reputation.


Understand what happens after an email gets sent. Access a wide range of key metrics—like open rates, bounce rates and click-through rates—to learn what works and what needs optimization so you can keep improving your email performance.


  • Avoid spam filters, prevent blocklisting, and lower hard bounce rates with powerful sending infrastructure
  • Automate the customer experience by connecting to thousands of other apps with Zapier
  • Get instant push updates with webhooks
  • Receive customer replies sent to your domain with an inbound route feature
  • Monitor all email interactions such as opens, clicks, open locations and devices. Plus, use your own subdomain and get a custom tracking link!

How it works

  1. Install and activate the MailerSend plugin.
  2. Add your SMTP credentials from MailerSend to establish the connection.
  3. Test your connection to make sure it’s working.
  4. And get sending!


Get help whenever you need it. Contact us or drop a message via live chat in the app. MailerSend’s dedicated support team works 24/7 because transactional emails never stop.


Minimum requirements

Requires at least PHP 7.4 and WordPress 5.8.


Install the official MailerSend SMTP plugin using any of the following methods.

Using the WordPress Dashboard

  1. Go to the Plugins dashboard and click Add New.
  2. Search for MailerSend SMTP.
  3. Click Install Now.
  4. Go to Installed Plugins and activate the plugin.

Uploading in WordPress Dashboard

  1. Go to the Plugins dashboard and click Add New.
  2. Click on the Upload Plugin button.
  3. Select the plugin zip file from your computer.
  4. Click Install Now.
  5. Go to Installed Plugins and activate the plugin.

Using FTP

  1. Download the plugin.
  2. Extract the file to your computer.
  3. Upload the contents to your /wp-content/plugins/ directory.
  4. Go to Installed Plugins and activate the plugin.


Why use MailerSend rather than WordPress to send emails?

  • Most WordPress hosting services use the PHP mail() function to send emails. But different email configurations between web hosts mean that they may not be optimized for deliverability.
  • MailerSend takes care of email delivery so your emails reach your customers safely. Plus, you get a dashboard that shows you important data about your emails and how their performance can be improved.
  • For more information, read this blog article about why WordPress and WooCommerce might not send your emails every time.

What do I need to get started?

To send emails, you only need to sign up for a MailerSend account and add a verified domain. For a step-by-step guide, check out our help article on getting started with MailerSend.

How do I set up automatic transactional emails?

Create a MailerSend account, enable SMTP for your verified domain, and add it to your plugin. You can now focus on growing your brand and let MailerSend take care of delivering your emails.

Is this plugin free?

Yes! You can send up to 3,000 emails/month with MailerSend for free as well. For a higher volume of emails, you can pick from pay-as-you-go plans without long-term commitments. Premium plans start from $30/month for 50,000 emails/month. Compare the different plans here.

Can you add a new feature to this plugin?

We’re open to suggestions and feedback to improve the plugin. You might see your request in a future version! Talk to us here.


12 Aibreán, 2023 1 reply
The mailersend application is fantastic. I can’t speak highly enough about deliverability and functionality. However, if you are using this as a transactional email system for WooCommerce you cannot use the mailersend templates (which are particularly good) and have Mailersend send other WordPress-related emails, such as comment notifications and other emails such as Gravity Form entries. You cannot run this plugin and the MailerSend WooCommerce plugin together as it will create a critical WordPress error on transactional email sends. This seems like an oversight and I’m not really sure why these two plugins cannot be one and handle not only transactional WooCommerce but also WordPress emails.
19 Márta, 2023 1 reply
I don’t understand why reviewers gave this plugin a negative review “for not working” because it works perfectly. They must have forgotten to verify their account with MailerSend. The domain verification and account approval took less than a day to complete and I could send out emails in a blink of an eye. I switched to MailerSend because my Namecheap SMTP took twice the amount of time to post my contact form. With MailerSend, form submission takes 3-4 seconds. Kudos and thumbs up to the developers! I highly recommend MailerSend!
21 Nollaig, 2022 1 reply
MailerSend’s SMTP plug in made it easy for us to integrate email in our website. Easy to set up, and great support. They also have well design email templates to make the job easier. We’ve been using it for a 5 months not and we’re happy with the service. Great for newbies and no-coders too.
2 Bealtaine, 2023
<p>I’m using MailerSend as transactional email provider because they offer some great features that other providers don’t have.<br />Beside this they have a great deliverability, sending speed and the MailerSend interface is really nice.</p> <p>The plugin does a good job, but it’s much to basic in my opinion.<br />I’m missing features like:<br />- Import / export settings<br />- Custom email headers<br />- a simple log file (now I need to check every issue via the MailerSend portal)</p> <p>And why sending emails via SMTP and not via the MailerSend API?</p>
1 Deireadh Fómhair, 2022 1 reply
Jesus Christ, you had one job. Its not working. – no security plugins blocking connections – 10x times checked credentials – yep, please code better
Read all 9 reviews

Contributors & Developers

“MailerSend – Official SMTP Integration” is open source software. The following people have contributed to this plugin.




  • Update conflict list
  • Tested up to the latest WordPress version


  • Add Tags field
  • Tested up to the latest WordPress version


  • Tested up to the latest WordPress version


  • Initial Release