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EMAIL API

Add email into your app

A fast, reliable Email API for transactional and marketing mail, on the same carrier-owned platform that already runs your SMS, voice, and WhatsApp. One API, one bill, one vendor.

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Email API
WHY TELNYX

One communication platform, built for every channel

  • Every channel on one platform

    Every channel on one platform

    Email joins SMS, voice, and WhatsApp on a single Telnyx account. One API key, one dashboard, one invoice. Add a channel without adding a vendor.

  • Email deliverability authentication passing SPF, DKIM, DMARC

    Deliverability built in

    Telnyx delivers email over its own communications infrastructure, with SPF, DKIM, and DMARC authentication, DKIM key rotation, and real-time reputation monitoring. High-volume senders can use dedicated IPs to isolate their sender reputation from shared traffic.

  • Built for developers

    Built for developers

    A clean REST API with code examples in your stack, and a first send in minutes. Transparent logs down to the individual event, so you debug what actually happened instead of guessing.

FEATURES

Everything you need to send, track, and protect your email

A full sending stack, from transactional receipts to marketing broadcasts, without stitching tools together.

  • Transactional email

    Receipts, password resets, OTPs, and alerts delivered on carrier-grade routes.

  • Marketing broadcasts

    High-volume campaigns with the same deliverability as your transactional mail.

  • Dedicated IPs

    Dedicated sending IPs for high-volume senders. Warm up new IPs with built-in controls, group them into IP pools, and route traffic through the pool you choose, so your sender reputation stays fully isolated.

  • Dynamic templates

    Reusable templates with Liquid variables, strict_variables validation, optional defaults through variable_schema, and HTML autoescaping for rendered expressions. Works cleanly with component-based email workflows.

  • Scheduled sends

    Queue email for a specific time with a single field. Reschedule in place with PATCH, and invalid timestamps return 422 instead of triggering an immediate send.

  • Batch sending

    Send up to 1,000 messages in one API call with a 207 multi-status response. One failed message never blocks the rest.

  • Attachments

    Send files as Base64 attachments with any email.

  • Webhooks and events

    Real-time notifications for delivered, opened, clicked, bounced, and complained messages, plus gateway rejection, injection timeout, queue expiration, cancellation, daily-limit, and system-failure events. Add tags and metadata to message resources and filter message lists by them.

  • Email inboxes

    Receive email on inboxes on your verified domains or the shared inbound subdomain. List and search inbound messages, organize threads with labels, and reply, reply-all, or forward with one call.

  • Sandbox testing

    Test delivered, bounced, deferred, complained, and rate-limit flows using reserved @test.telnyx.com recipients. No real email sent, no billing or reputation impact.

Fits right into your stack

Send email with a simple REST API and SDKs for the languages you already use.

Explore dev docs

cURL

curl -X POST https://api.telnyx.com/v2/emails \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer ***" \
  --data '{
    "from": "Acme <[email protected]>",
    "to": ["[email protected]"],
    "subject": "Welcome to Acme",
    "html": "<p>It works!</p>"
  }'

Node.js

import Telnyx from 'telnyx';

const telnyx = new Telnyx('YOUR_API_KEY');

await telnyx.emails.send({
  from: 'Acme <[email protected]>',
  to: ['[email protected]'],
  subject: 'Welcome to Acme',
  html: '<p>It works!</p>',
});

Python

import telnyx

telnyx.api_key = "YOUR_API_KEY"

telnyx.Email.send(
    from_="Acme <[email protected]>",
    to=["[email protected]"],
    subject="Welcome to Acme",
    html="<p>It works!</p>",
)

See it in action

Send your first transactional email in under five minutes with zero DNS configuration using a Telnyx shared domain. Generate AI-powered responses and send replies through the Email API, all on one platform.

HOW IT WORKS

From API call to inbox, on one network

Three steps from setup to a tracked send. Telnyx carries the message and reports every event back to you.

PRODUCTS

The rest of the stack, when you want it

The Email API is one channel. When you are ready to reach customers across more of them, SMS, Voice, and WhatsApp all sit on the same network, same API key, same bill.

See all products
  • SMS API

    SMS API

    Send and receive SMS globally with a single API. Same account, same key as your email.

    Learn more
  • Voice API

    Voice API

    Programmable call control for inbound and outbound calls on carrier-grade routes.

    Learn more
  • WhatsApp Business API

    WhatsApp Business API

    Reach customers on WhatsApp with templated and session messaging.

    Learn more
  • Voice AI Agents

    Voice AI Agents

    Voice AI Agents that call customers directly, on the same carrier-grade network as your email. Same number, same platform.

    Learn more
  • Number Lookup

    Number Lookup

    Validate and enrich phone numbers with carrier and line type data.

    Learn more
Telnyx Agent Skills

Build faster with AI

Telnyx Agent Skills provides pre-built tools for AI coding agents like Claude Code, Cursor, and Windsurf to integrate with the Telnyx API in minutes. Available in Python, JavaScript, Go, Java, and Ruby. Let your AI coding assistant write Telnyx integrations. Build in minutes.

Learn more

PRICING

See our Email API pricing

Pay-as-you-go, volume-based pricing. No subscriptions, no minimums. Start at $0.30 per 1,000 emails, scaling down to $0.15 at higher volumes.

Starting at

$0.30

per 1,000 emails
See pricing

Sign up and start sending

Add email to the platform that already carries your other channels.

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FAQ

A REST API for sending transactional and marketing email programmatically, running on Telnyx's owned communications infrastructure alongside your SMS, voice, and WhatsApp channels.