
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 99.90%+ uptime, ready-to-use SDKs, and a platform built for developers.
The Simpler Way to Send Emails
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
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
Track every email in real time—from sends and deliveries to opens and clicks. Troubleshoot faster with complete event details.

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

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

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.


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.
Experience the Maileroo Difference

Support When You Need It
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
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
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.
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Ready to start sending emails?