Email API/SMTP

Choose the integration method that fits your stack—without compromising on speed, flexibility, or deliverability.

Whether you prefer the simplicity of SMTP or the precision of a modern email API, SocketLabs gives you both—ready to plug into your system, scale with your needs, and deliver your email reliably.

SocketLabs API/SMTP At-A-Glance

Everything you need to know about your email performance- right when it matters, all in one place

Flexible Sending Options

Send via SMTP or REST API—whichever fits your stack—with reliable performance and full deliverability support behind both.

Fast, No-Hassle Integration

Get up and running in minutes using SMTP, or use our clean, modern API to build deeper functionality into your product.

Full Visibility into Every Message

Track opens, clicks, bounces, and more in real-time—via webhooks, dashboards, or Spotlight—so you’re never in the dark.

Secure, Scalable Infrastructure

Every message runs through a secure, high-performance backend with support for authentication, encryption, and smart retry logic—built to scale as you grow.

Send email via SMTP or our flexible API, available in C#, PHP, Node.js, Phython, GoLang, Java, and Ruby

Send fast. Send flexibly. Send with confidence.

You shouldn’t have to fight your infrastructure just to get a message out the door. Our email delivery platform offers both robust SMTP support and a powerful REST API, so you can build what works for your workflow—without sacrificing performance or control.

SMTP for Speed and Simplicity

Whether you’re integrating a CMS, an ecommerce platform, or a custom app, SocketLabs makes it easy to start sending in minutes.

  • Standard Protocols – Supports ports 25, 2525, 465 (SSL), and 587 (TLS)
  • Quick Setup – Drop in your credentials and go
  • Supports MIME & Attachments – No formatting hacks required
  • TLS Encryption – Secure by default
Enjoy reliable delivery with SocketLabs 99.999% uptime.

API for Precision and Power

When you need full programmatic control, the SocketLabs Email API gives you everything you need—without the bloat.

  • Send Complex Messages – Supports personalization, templates, CC/BCC, and attachments
  • Multiple Content Types – Send plain text, HTML, or both
  • Track Everything – Opens, clicks, bounces, complaints—available via webhooks or API endpoints
  • Built for Devs – Clean JSON structure, strong docs, and quick to integrate

Use the API when you need granular control, dynamic content, or feedback loops.

Built-In Deliverability, Either Way

It doesn’t matter how you send—SocketLabs applies the same powerful infrastructure behind the scenes:

  • Automatic bounce processing
  • Feedback loop handling
  • SPF/DKIM/DMARC support
  • Smart throttling and retry logic
  • Access to IP Pools, Subaccounts, and Rule Engine

You’re not just sending email—you’re sending it right.

What Customers Say About Us

"SocketLabs is clearly driven by customer success and has become a trusted partner of SignUp.com"
"It was like a breath of fresh air having something that we could plug into in our environment, and make a few customizations, and be up and running in the blink of an eye."
"We've been working together for at least 8 years, and we wouldn't trust anybody else with our email delivery."
Lindsay Willott
CEO, Customer Thermometer

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