Email api

The reliable, scalable email API you can trust 

Power your email with enterprise-grade speed, real-time deliverability insights, and APIs developers love with Sinch Mailgun. Get a reliable, scalable email API with 99.99% uptime and an industry leading suite of deliverability tools and services.  

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Join over 150,000 businesses, including 8 of the 10 largest tech companies in the world

WHY MAILGUN 

Infrastructure, insights, and support built for businesses 

Reach every inbox confidently. Mailgun brings together proven scale with proactive reputation management and deep analytics, so technical and marketing teams move faster and grow smarter. 

Reliability at scale

With 99.99% uptime and 700B+ emails per year, your most important messages get delivered quickly, even during peak spikes. 

Inbox placement 

Proactive reputation management and deep analytics can help cut bounces by 21%, boost opens by 65%, and clicks by 100%. 

Developer efficiency  

Language-agnostic APIs, clear docs, webhooks, and logs let teams deploy email features fast without losing visibility or control.
Image pour Enterprise grade infrastructure guarantees delivery at any scale 

RELIABILITY & SCALE 

Enterprise grade infrastructure guarantees delivery at any scale 

With 99.99% uptime and the ability to process 700B+ emails annually, the Mailgun email API keeps important communications flowing, even during unpredictable traffic spikes, so users, customers, and revenue never miss a beat. 

  • High-volume throughput  

  • Seamless scaling removes technical hurdles 

  • SLAs keep teams confident and accountable

Image pour Built-in tools and experts drive higher inbox placement 

DELIVERABILITY 

Built-in tools and experts drive higher inbox placement 

Mailgun optimizes real-time monitoring, proactive reputation management and testing, along with a full in-house deliverability services team to help even the most complex senders see fewer bounces and dramatically higher engagement rates. 

  • Customers have seen 21% fewer bounces, 65% more opens 

  • Only ESP with fully, in-house built email deliverability suite  

  • Active monitoring for critical reputation signals help pinpoint issues before they hurt ROI 

  • Dedicated Technical Account Managers with over 320 years of combined expertise 

Image pour Smart validation cuts risk and cleans your data automatically 

DATA QUALITY & RISK 

Smart validation cuts risk and cleans your data automatically 

Real-time or batch validation uses cached sending data and engagement checks to stop spam traps, typos, and invalid addresses before they hurt your reputation or waste your send volume. 

  • Pair validation with engagement data 

  • Improve sender reputation 

  • Minimize list decay 

WHERE IT WORKS 

Email challenges solved with Mailgun 

High-volume delivery 

Power marketing and transactional programs with unmatched throughput and delivery with 99.99% uptime.

Business-critical uptime  

Support apps and services that need instant, reliable email communication without managing your own infrastructure. 

Deliverability suite  

Monitor your reputation, proactively test critical deliverability signals, and leverage TAM expertise to help avoid and resolve issues before they impact revenue. 

List validation suite  

Remove risky or invalid addresses in real time or batch to protect your sender reputation and improve campaign ROI. 

WHAT’S INCLUDED 

Everything teams need to send, optimize, and scale email 

Email API  

Send, receive, and track emails programmatically with Mailgun's powerful RESTful API.  

SMTP server  

Tap into Mailgun’s reliable SMTP infrastructure and skip having to manage your own SMTP email servers.   

Inbox Placement Testing 

Proactively improve inbox placement, so more emails land where they’ll be seen. 

Email list management 

Manage and clean your email list to boost deliverability. 

Email logs 

Review detailed email logs to track and troubleshoot email delivery issues at the deepest level. 

Analytics  

Multi-dimensional reporting with logs and bounce data for faster fixes. 

Send time optimization  

Increase engagement rates by optimizing email send times based on recipient behavior. 

Support & dev tools 

REST APIs, SDKs, webhooks, and detailed docs accelerate integration. Plus, get support from dedicated experts to resolve issues before they escalate. 

GET STARTED  

Customize your email sending 

Mailgun Send 

Get a reliable, scalable email infrastructure that ensures high-volume and mission-critical messages are delivered quickly and consistently. 
Explore Mailgun Send

Mailgun Optimize

Improve inbox placement and engagement by proactively managing deliverability, sender reputation, and performance insights.
Explore Mailgun Optimize

Mailgun Validate

Protect your sending reputation by verifying email addresses in real time or as a batch, reducing bounces, spam traps, and invalid recipients.
Explore Mailgun Validate

Mailgun Inspect

Analyze email content and code before you hit send to find rendering, compatibility, and deliverability issues. Stop failures in their tracks and optimize performance across email clients.
Explore Mailgun Inspect

Frequently asked questions about Mailgun's email API 

The Mailgun email API lets applications send, receive, and track email through HTTPS endpoints instead of managing SMTP servers, with logs and webhooks for visibility. 

SMTP is simple to start, while an email API offers better performance, observability, and control (e.g., webhooks, granular logs, and retries). 

Use our REST endpoints or SDKs, authenticate your domain (SPF, DKIM, DMARC), and start sending with sample code from the docs. 

No. All sending and receiving happens through APIs, but any front-end can tap those same endpoints. 

Both marketing and transactional email are supported and delivered reliably at any volume. 

Mailgun focuses on backend email delivery and deliverability. It's not a campaign orchestration tool. Many workflows can be built via integrations like Zapier or Workato. 

We hold ISO 27001, SOC 2, GDPR, CCPA, HIPAA, and PCI DSS certifications to meet even the strictest security and privacy needs. 

Sign up for a free plan to start testing immediately. Self-service tiers scale with usage and overages, and contract pricing is available via a pricing calculator for larger volumes. 

You’ll get access to developer-friendly docs, logs, and webhooks, plus optional dedicated support and TAM guidance for deeper deliverability insight.