Free Email API for Developers

Deliver emails faster with Maileroo’s free, easy-to-use JSON Email API - 3,000 emails/month included. Send bulk or scheduled emails, attach files, embed inline images, and create anything from simple emails to fully templated messages powered by Handlebars. Enjoy 99.95%+ uptime, ready-to-use SDKs, and a platform built for developers.

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Free Email API

The Developer-First Email API

A powerful JSON API to send basic, bulk, or scheduled emails with attachments, inline images, and Handlebars templates. We provide a 99.90% uptime guarantee, ready-to-use SDKs, and a platform built for developers by developers. No enterprise BS.

Templates & Handlebars Support

We have built a powerful template system that allows you to create dynamic emails with ease. Use our in-house template builder or implement your own templates using Handlebars syntax. Personalize your emails with dynamic tags and create engaging content that resonates with your audience.

Bulk & Scheduled Emails

Send bulk emails to your users with ease. Our free email API allows you to send up to 500 emails at once, ensuring that your messages reach your audience quickly and efficiently. Schedule emails to be sent at a later time, making it easy to send important notifications or updates to your users.

Easy Integration & SDKs

Our free JSON-based email API is easy to integrate. With ready-to-use SDKs for PHP, Laravel, Node.js, Python, Go, .NET, Java, and more, you can quickly add email functionality without complex setup. Our platform is built for developers by developers, ensuring a smooth integration experience.

Attachments & Inline Images

Easily include attachments and inline images in your emails. Our free email API supports file attachments and inline images, allowing you to send rich content directly to your users' inboxes. Enhance your emails with images and files that provide additional context and value to your messages.

Custom Headers & Tags

Add custom headers and tags to your emails for better organization and tracking. Our free email API allows you to include custom headers in your requests, enabling you to categorize and manage your emails effectively. Use tags to track the status of your emails and monitor their delivery.

3,000 Emails/Month Free

Our free email API offers a generous free tier, allowing you to send up to 3,000 emails per month without any cost. This makes it easy for developers and businesses to get started with email functionality without worrying about expenses. Upgrade to our paid plans as your needs grow.

Choose From a Growing Range of Languages

Maileroo integrates with nearly any platform, backed by ready-to-use SDKs and libraries. Whether you’re a developer or a business, our free email API makes it easy to get started. Choose from a growing range of languages, including PHP, Python, Ruby, Java, Go, .NET, and more.

All the Tools You Need to Send Emails

SMTP Relay & Email API

SMTP Relay & Email API

Send your messages the way you prefer, whether via API or SMTP. Both integrate smoothly with your systems and are built for simplicity.

Real-time Logging

Real-time Logging

Track every email in real time—from sends and deliveries to opens and clicks. Troubleshoot faster with complete event details.

Insights & Analytics

Insights & Analytics

Understand how your campaigns perform with metrics like open rates, clicks, and bounce data to fine-tune your email strategy.

Custom Tracking Domains

Custom Tracking Domains

Brand your tracking links with your own domain to build trust and boost deliverability. SSL included, quick setup guaranteed.

Webhooks

Webhooks

Keep your application instantly updated with webhooks for events like opens, clicks, and bounces, ensuring your data stays current.

Inbound Routing

Inbound Routing

Say goodbye to no-reply addresses. Forward incoming emails to your application or inbox, allowing you to handle replies and interactions seamlessly.

Fast, Free, and
Developer-Ready

Sending email shouldn’t feel like rocket science, and with Maileroo’s JSON Email API, it doesn’t.

Send basic, bulk, or scheduled emails. Add attachments, drop in inline images, or use full-blown templates with Handlebars. Track every delivery, add custom headers, and even send emails with tags. It’s all here, and it’s all free.

You get 3,000 free emails every month, no credit card needed. Plus, drop-in SDKs for PHP, Node.js, Python, Go, .NET, Java, and more, so you’ll be doing what you do best: building great products.

Built for developers, backed by a 99.90% SLA, and supported with docs that get you from zero to sending in minutes.

This isn’t just another API. It’s the easiest way to send emails that actually deliver.

Sign Up for Free
Generate Email API Sending Key
Send Dynamic Emails

Create Dynamic Emails
with Handlebars.js Templates

With a full Handlebars.js template engine and our proprietary drag-and-drop email builder, you can create powerful dynamic emails using variables, loops, and complex conditional statements -- all included for free.

Send bulk emails, schedule campaigns, manage templates, and embed inline attachments with ease. Every email is fully logged, so you can monitor delivery and know your messages are reaching the inbox.

Don’t settle for less, Maileroo gives you complete control over personalization, templates, and delivery in one seamless API.

Switch to Maileroo
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Crafted for a Delightful Email Experience

Inbound Email Routing

Inbound Email Routing

Receive emails directly into your application with our inbound email routing service.

GDPR Compliant

GDPR Compliant

Our servers are based in Europe, ensuring full GDPR compliance. Your privacy is our top priority.

Scalable Infrastructure

Scalable Infrastructure

We run on a scalable infrastructure that can handle any volume of emails you throw at us.

High Deliverability

High Deliverability

We prioritize maintaining a high IP reputation to ensure your emails land in the inbox.

Analytics & Logging

Analytics & Logging

Track your email performance with our detailed analytics and logging features.

99.95% Uptime

99.95% Uptime

We're committed to delivering reliable service with an impressive 99.95% uptime track record.

Friendly Email API & Webhooks

Friendly Email API & Webhooks

Developers love our easy-to-use API and webhooks for integrating email into their applications.

List Cleaning & Validation

List Cleaning & Validation

Ensure your email list is clean and up-to-date with our list cleaning and validation service.

Branded Tracking Links

Branded Tracking Links

Customize your tracking links with your own domain to maintain brand consistency.

What Makes Maileroo Different?

Premium Support

Premium Support

Got a question or feeling stuck? We’ve got you covered. No ticket numbers, no long queues, and no canned replies, just real people ready to help with your email needs.

99.90% Uptime Guarantee

99.90% Uptime SLA

Our cloud infrastructure is designed for rock-solid reliability. With 99.95+% uptime, your emails go out on time, every time, so you can focus on growing your business while we take care of email delivery.

Scalable Infrastructure

Scalable Infrastructure

From startups to global enterprises, Maileroo grows with you. Whether you’re sending a handful of emails or millions, our platform scales seamlessly to meet your needs, without ever compromising on performance or reliability.

Do more than just sending emails

Packed with features like email tracking, customizable templates, and easy integration, Maileroo's Free Email API is the perfect solution for developers looking to send emails from their applications. Get started today and see how Maileroo can help you engage with your audience and grow your business.

Get Started for Free

Reviews

Hear From Our Satisfied Customers

Don't just take our word for it. Read what our customers have to say about our service.

Vincent Turner

Vincent Turner

“I've been through a number of mail services over the last few years and maileroo is a standout for me. Everything about it. The underlying service is great, the architecture is solid and its super reliable and delivery is fast. As well as that the UX for the interface is also really well crafted making it a pleasure to use. Beyond that the service levels are superb, fast and useful. Lastly, the price point is superb. It really is hard to fault Maileroo, I'd give it 6 stars out of 5 if I could”
Rizky Muhammad

Rizky Muhammad

“Very pleasant experience with Maileroo. We successfully migrated from Mailjet without any problems. The technical team was very helpful and listened to suggestions and created new features in a relatively short time.”
Aarón B.

Aarón B.

“I really like it. It is a new service, so there is always the possibility that as it grows, it might deteriorate over time, but my experience so far has been exceptional. The instructions for adding domains are clear and easy to follow, domain verification after adding the correct DNS records is very fast, the emails are sent promptly, and so far none of them have ended up in spam folders.”
Umar Faruk

Umar Faruk

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“Maileroo offers an appealing email-sending solution for website owners, and I am extremely pleased to collaborate with them. Their platform is user-friendly and the assistance they provide is remarkably prompt and supportive.”
Shaun Smith-Roberts

Shaun Smith-Roberts

“What a Joy to work with, I couldn't be more impressed with the services provided by Maileroo.com. From the moment I signed up, the experience was seamless and efficient. The platform is incredibly user-friendly, making it easy for me to manage my emails and campaigns effortlessly.”
Darius (Webmate)

Darius (Webmate)

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“The support was really fast, and the whole process was very easy to set up. I requested an increase in the 100 emails/hour limit, and within a few minutes, the team had increased it. So far, so good.”
Kris Flynn

Kris Flynn

“I'm not a techie person or programmer, and this is my first time using an SMTP server. I was having some issues setting up one of my tools with maileroo's SMTP servers. A quick support chat inquiry led me to one of the co-founders who spent about an hour with me to solve my issue. In the end, it was all my own human error. We were able to fix the issue, but the best thing about the whole experience was how patient and pleasant Areeb was. Just a really great experience, especially for someone like me who isn't a developer or IT specialist.”
Larry

Larry

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“Maileroo is easy to congifure the SMTP relay to send your transactional emails. It works perfectly. The SMTP plugin that you recommended did not work for me, but I had both problem using a free SMTP plugin. Also I was not able to understand how to use the API. I would like to be able to assigns sending limits per each domain. I only purchased I code because there was only 1 Tier listed. I might have stack 2 codes if I new the limits offer with 2 codes.”
piccinato

piccinato

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“Congratulations to the Maileroo team for creating an easy and user-friendly platform. This is a very nice and generous deal. Thank you.”
christina

christina

“I was blown away by the customer support of Maileroo. I signed up for a free tier of their service because I had a client with simple but specific needs and it seemed like a perfect fit. However, since I was new to setting any of this up, the entire process was a learning curve for me.”
Grega

Grega

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“We were searching for a new SMTP provider, after the one we were using raised the prices for the 3rd time - in 2 years. We Found Maileroo and couldn't be happier. Everything works smoothly, prices are top-notch, and their support is friendly and helpful.”
Ed Ellingham

Ed Ellingham

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“We've been using Maileroo for quite a while now and it just works. Great features, and even better support!”
Dahunsi

Dahunsi

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“AWESOME! I got to know about Maileroo through an online community and I tried it. I have not used any other service for my transactional mail since then.”

Listen To Their Stories

Success Stories

Find out how Maileroo is helping thousands of businesses send transactional & marketing emails.

Ready to start sending emails?