How to send transactional emails for free with Cloudflare?

What if I told you that, with Cloudflare Workers, it is possible to send all your transactional emails for free? Wouldn’t that be amazing?

You know that sending emails is crucial for businesses, and the SMTP protocol is a pillar of the Internet. However, it costs a lot of money for companies that communicate via this means. That’s why today I’m showing you a powerful solution to send free transactional emails from your Cloudflare Workers using MailChannels.

Indeed, the integration of MailChannels with Cloudflare Workers makes it easy to send emails with various parameters, such as adding sender and recipient names, sending to multiple recipients, and using BCC and CC. Additionally, it is possible to specify a reply email address.

All this without requiring domain validation or account creation. MailChannels filters spam before sending and is completely free. Additionally, the integration only works with Cloudflare IP addresses, providing extra security.

To deploy this technological marvel, you must log into your Cloudflare account and click on this Worker deployment link.

To improve your email-sending security, don’t forget to add an SPF record to your domain to prevent email spoofing. And to add an extra layer of protection, configure DKIM as well.

Then, sending emails is as simple as making a POST request to the endpoint /api/email. Just send it the correct JSON. Here is an example of JSON for sending a classic text email:

{ 
"to": "john@example.com", 
"from": "me@example.com", 
"subject": "Hello World", 
"text": "Hello World" 
}

And if you want to include several recipients:

{
 "to": [ 
{ "email": "john@example.com", "name": "John Doe" }, 
{ "email": "rose@example.com", "name": "Rose Doe" } ], 
"from": "me@example.com", 
"subject": "Hello World", 
"text": "Hello World" 
}

You can even send emails in HTML format! If you want to create a contact form on your website, you can use that with the Pages Plugin framework to make your life easier.

And that’s how to send emails for free and hassle-free with Cloudflare Workers and MailChannels.