SMTP Relay & Email API
Two ways in. Drop our SMTP credentials into any app, or call the Email API directly. Both take minutes, both just work.
Free Email APIDeliver emails faster with Maileroo's free, easy-to-use JSON Email API. 3,000 emails/month are 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 and businesses that are just starting out.
Core FeaturesSend with confidence, track every message as it moves, and tune your performance. One platform, built developer-first. And deliverability? We fine-tune it obsessively behind the scenes, so your emails land where they should.
Two ways in. Drop our SMTP credentials into any app, or call the Email API directly. Both take minutes, both just work.
Sent, delivered, opened, clicked: watch every event the moment it happens. When something breaks, the logs tell you why.
Open rates, click rates, bounces, complaints. The numbers you need to sharpen your sending, all in one dashboard.
Push bounces, opens, clicks, and deliveries straight into your application the instant they happen. Your app stays in sync without polling.
Put tracking links on your own domain. Better brand consistency, better deliverability. SSL is provisioned for you, and setup takes one click.
Retire the no-reply address. Replies land in your inbox, routed by Maileroo, so real conversations can happen.
Free Email APIA 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 complexity.
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.
Send bulk emails to your users with ease. Our 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.
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.
Easily include attachments and inline images in your emails. Our 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.
Add custom headers and tags to your emails for better organization and tracking. Our 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.
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.
Quick IntegrationMaileroo 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.
1$client = new MailerooClient('your-api-key');2 3$client->sendBasicEmail([4 'from' => new EmailAddress('[email protected]', 'Sender Name'),5 'to' => [new EmailAddress('[email protected]', 'Recipient Name')],6 'subject' => 'Hello from Maileroo!',7 'html' => '<h1>Hello World!</h1><p>This is a test email.</p>',8 'plain' => 'Hello World! This is a test email.'9]);10 
Quick SetupSign up, grab your API key, hit send. That's it. The whole thing takes about five minutes, and our docs walk you through every step if you get stuck.
Free & Developer-ReadyThe free tier includes 3,000 emails each month, no credit card requirement, and the SDKs, templates, logs, and delivery controls needed to put email into production.
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.
Drop-in SDKs for PHP, Node.js, Python, Go, .NET, Java, and more let you do what you do best: build 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 in 2026.
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.
Email ExperienceReceive inbound mail, protect customer privacy, maintain sender reputation, and measure every message without stitching together separate tools.
Receive emails directly into your application with our inbound email routing service.
Our servers are based in Europe, ensuring full GDPR compliance. Your privacy is our top priority.
We run on scalable infrastructure that can handle any volume of email you send.
We prioritize maintaining a high IP reputation to ensure your emails land in the inbox.
Track your email performance with our detailed analytics and logging features.
We're committed to delivering reliable service with an impressive 99.9% uptime track record.
Developers love our easy-to-use API and webhooks for integrating email into their applications.
Customize your tracking links with your own domain to maintain brand consistency.
Why MailerooReal people on support, whenever you're stuck. Infrastructure built for 99.9% uptime, so sending never skips a beat. Room to grow from your first email to your millionth.
Whether you're stuck or just have a quick question, we're here to help. No ticket numbers, long wait times, or generic responses. Just real people ready to assist you with your email needs.
Our cloud infrastructure is built for reliability. With 99.99% uptime, your emails are always sent on time, every time. Focus on your business while we handle the heavy lifting of email delivery.
Whether you're a startup or a global business, Maileroo scales with you. From sending a few emails to millions, our platform adapts to your needs without compromising on performance or reliability.
Platform FeaturesOur free email API is one piece of a larger platform. Dedicated IPs, streams, suppression handling, templates, webhooks, audit logs, and more are all there when you need them.
Send email through SMTP relay or the Email API with flexible options that fit the way your stack already works.
Protect your sender reputation with dedicated IP addresses built for consistent, high-volume enterprise delivery.
Keep transactional and marketing traffic in separate streams so one channel never puts the other at risk.
Connect every app and website you need on paid plans, with no hard limit on how many domains you can send from.
Give each domain its own logs, analytics, and credentials so teams and brands stay fully separated.
Attach multiple domains to one vendor or service, then set outbound security rules that match your workflow.
Review up to 30 days of sending data and dig into the metrics that show how every campaign is performing.
Search 14 days of email logs with advanced filters so you can find issues quickly and stay in control.
Resend failed, suppressed, or delayed messages from the dashboard for up to 14 days with a single click.
Automatically manage bad recipients, then import or export suppression lists whenever you need a closer look.
Measure opens and clicks across every send so you can see what engages people and improve the next campaign.
Use your own branded tracking domain on links to keep recipient trust high and your brand front and centre.
Set the return-path address that processes bounces and delivery updates so feedback loops stay accurate.
Watch your IPs and domains across major RBLs so reputation problems are spotted early, not after the damage.
Push delivery, bounce, and engagement events into your systems in real time so workflows can react instantly.
Route incoming email into your apps and workflows with inbound processing that fits how your team operates.
Build templates in the drag-and-drop editor, render them dynamically via API, and start from 200+ ready designs.
Import HTML from a file, zip, or URL, then adjust the design visually without writing or debugging any code.
Invite teammates and assign permissions with fine-grained control over what each person can view or change.
Configure passwordless SAML sign-in for your organization. Enabled your organisation greater security and compliance.
Add two-factor authentication with popular authenticator apps to keep account access locked down and secure.
Track collaborator activity across your account so every important change is logged and easy to review.
Test sending and integrations on a free domain before launch, so production stays clean while you experiment.
Add and manage domains programmatically through the API so onboarding new sending domains stays automated.
Connect with official SDKs in major languages, or plug into tools like Zapier, Make, and WordPress in minutes.
Follow clear documentation with practical examples so your team can integrate quickly and with confidence.
Configure DNS on Cloudflare in one click, with setup that respects your existing records and avoids surprises.
Export delivery reports, suppressions, and more whenever you need the data outside the Maileroo dashboard.
Get help from people with real email experience, so your first contact already understands the problem space.
Need help in real-time? Our live chat is available for both general and technical support.
ReviewsWe're a small team, which means when you write in, you're talking to someone who works on the product. Startups, agencies, and growing businesses stay with Maileroo because the support is real, the pricing is honest, and the infrastructure holds up.
"I love it as an SMTP service for transactional emails. The app is fast, easy to understand and fully featured, but not overwhelming, and email delivery is super fast and reliable. Just perfect! Every time I needed to request a feature or inquire about something with the team, they responded quickly and satisfactorily, both in their Discord channel and via email."
"I have been a Maileroo customer for almost 2 years now and I am very satisfied: Sending emails is super fast and reliable. The support is great and fast (usually within 1 hour). The interface is functional yet easy to use. You pay much less at Maileroo than at other providers without compromising on quality. In short, a great company to work with as an agency!"
"Using Maileroo for half a year now. Api and its documentation is simple, straightforward and just works. What truly makes the difference is the fast, personal support. Support is always quick to respond and to find a solution. Requests or suggestions are taken seriously and often translated into practical improvements. That level of personal involvement and service is rare and makes Maileroo a solution I can confidently recommend. Experience with mailgun, mailjet, sendgrid, resend and Maileroo takes the cake."
Success StoriesFind out how Maileroo is helping thousands of businesses send transactional and marketing emails.
Enabling a modern mortgage broker to deliver secure transactional emails with dependable infrastructure and consistent performance nationwide every day.
Supporting a creative web studio with dependable email delivery and flexible infrastructure for cultural organizations across Canada.
Helping a Melbourne digital agency improve email deliverability with reliable infrastructure and seamless WordPress integration for client projects of every size.
FAQFrom deliverability and infrastructure to pricing and integrations, here's what developers ask us most before they send their first email.
Maileroo is an email delivery platform designed to help businesses send both transactional and marketing emails reliably and at scale. We provide a simple yet powerful API, SMTP integration, and a user-friendly dashboard that makes it easy to manage your email communication from a single place. With a focus on deliverability, security, and ease of use, Maileroo handles the complexities of email infrastructure so you can focus on your product. From startups to enterprises, Maileroo offers scalable plans and dedicated support to ensure your emails reach the inbox every time.
Maileroo supports both transactional and marketing emails. You can send transactional emails such as password resets, order confirmations, invoices, and notifications, as well as marketing emails to users who have explicitly opted in to receive them. Whether you're sending automated system emails or managing marketing campaigns, Maileroo provides the tools to automate all of your email communication from a single platform. If unsure about the type of email you're sending, you can always contact our support team for guidance.
Maileroo is built with deliverability at its core. We use strict account verification, continuous monitoring, intelligent automation, and proprietary abuse detection to protect our sending reputation and reduce spam. Combined with automatic suppression handling, SPF, DKIM, and DMARC support, and ongoing infrastructure maintenance, these safeguards give legitimate senders the best chance of reaching the inbox.
Maileroo's infrastructure is strategically hosted in Germany, Netherlands, Finland and France, providing exceptional performance, reliability, and security for customers worldwide. Our infrastructure is fully GDPR compliant, ensuring your data is handled in accordance with strict European data protection regulations. With enterprise-grade security and modern data centers, you can trust that your data is safe with us.
Maileroo provides support through live chat and email, with our team based in Australia to provide both general and technical assistance. Our team is available from 9 AM to 9 PM Melbourne time. Whether you need help with setup, configuration, integrations, or troubleshooting, our experienced team is available to help you get connected and running smoothly. We understand that email infrastructure is critical to your business, which is why providing fast, knowledgeable support is a key priority for us. Our team has the technical background to assist with complex setups and ensure you have the support you need when you need it.
All Maileroo plans include a monthly email quota. If you exceed your allocated quota, any additional emails will not be sent until your quota resets or your plan is upgraded. For paying users, we include a 12% buffer on your monthly quota, giving you extra flexibility in case of unexpected spikes in sending volume. In addition to monthly limits, we apply an hourly sending limits to accounts as a security measure to help protect our sending infrastructure and maintain deliverability. These limits can be easily increased through your dashboard by submitting a request, and our team can quickly review and adjust them to ensure your email sending is not impacted.
We accept credit card or debit card including Visa, Mastercard and American Express, along with PayPal and cryptocurrency payments.
Yes, Maileroo is built to support businesses of all sizes, from startups and small teams to agencies and large enterprises. We offer scalable plans starting from a free 3,000 emails per month option through to custom solutions designed for businesses sending millions of emails and beyond. Our infrastructure is built to scale with your growth, providing reliable email delivery, flexible sending capacity, and the tools needed to power email communication for businesses of all sizes.
Yes. Non-profits and open-source projects get 50% off every Maileroo plan. Get in touch with a short note about what you're building and we'll set it up. No lengthy application, no annual commitment.
Loaded with FeaturesPacked 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.
Send transactional and bulk emails through reliable SMTP infrastructure built for speed, security, and deliverability.
Integrate email delivery into your applications using powerful APIs built for flexibility, scalability, and performance.
Separate transactional and marketing traffic into isolated sending streams to protect reputation and keep critical emails fast.
Receive and route incoming emails directly into your applications using flexible automation and processing workflows.
Create and deliver marketing campaigns designed to increase engagement, reach, and customer retention.
Receive real-time event notifications for deliveries, opens, and clicks for storage and automation workflows.
Monitor email performance with detailed insights, reporting tools, and actionable delivery metrics in real time.
Gain greater sending control with dedicated IPs designed for consistency, reputation, scalability, and reliability.
Build integrations faster using SDKs, code examples, and resources for modern application development.
