SMTP Service

Send email reliably—no email servers required.

TRUSTED BY TOP COMPANIES FOR WORRY-FREE SENDING:

Reliable delivery at scale

Confidently build and grow your email program.

Build and monitor your email solution on a trusted foundation. Select from a variety of expedited integration options to harness the power of Twilio SendGrid’s cloud-based, proprietary MTA.

Rely on globally distributed architecture
Tap into our MTA trusted to deliver over 100 billion emails/mo
Get technical and strategic assistance from real people

Developer optimized

Build exceptional customer experiences.

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{
 "category": [
        "newuser"
    ],
  "filters": {
    "footer": {
      "settings":
        {
          "enable": 1,
          "text/plain": "Thank you for your business"
        }
    }
  },
 "send_at": 1409348513,
  "unique_args": {
    "orderNumber": "12345",
    "eventID": "6789"
  }
}

Integrate and deliver in minutes with our RESTful APIs or SMTP relay. Access comprehensive documentation, open source libraries in 7 languages, and a clear setup flow to help you send right away.

Integrate with our feature-rich mail/send API
Plug into our SMTP relay for standardized sending
Enrich your SMTP relay sending with our SMTP API

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Build Something Better

Dynamic Templates

Email templates with HTML rendering and conditional formatting with testing previews—accessed by your API calls.

Dynamic Email Content

Email Validation API

Get results in real time to catch address typos in-form, bounce fewer emails and improve your sending reputation.

Learn About Email Validation API

Email Testing for Dynamic Templates

Test for inbox rendering, link validity, and performance against spam filters.

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Trust that your emails get delivered and your data is safe

Deliverability

The tools and expertise you need to optimize your inbox delivery rate.

Reach the Inbox

Scalability

Send on a world-class platform that delivers more than 100 billion emails every month.

Expertise

Experts can help you optimize your program, troubleshoot, and resolve issues.

Work with Experts

24/7 Support

Our support teams can give you information and guidance when you need it most.

Ready to start sending?

Free to get started. Free to send.