Email API Now Generally Available

28, Aug 2026

The Telnyx Email API is now generally available. The beta period that began on July 29 is over, and email is now a production-grade channel on the Telnyx platform. No waitlist, no invite-only. Any Telnyx customer can start sending email immediately.

Transactional and marketing email, on the same carrier-owned platform you already use for SMS, voice, and WhatsApp. One API key, one dashboard, one bill.

What's new since beta

General availability: No waitlist or invite required. Any Telnyx customer can start sending from the portal or API immediately. New customers can sign up and send in minutes.
Shared sending domain: Use a Telnyx-provided shared domain for self-serve setup, or bring your own domain with full DNS verification.
Pay-as-you-go pricing: Volume-based pricing starting at $0.30 per 1,000 emails, scaling down to $0.15 per 1,000 at higher volumes. No subscriptions, no minimums. See pricing.
Inbound email: Create inboxes on verified domains, receive inbound messages via email.received webhooks, and build reply and thread workflows.
Email validation: Free single and batch email validation to catch invalid addresses before you send.
Suppression management: Two-tier suppression check at API and inject time, CSV import/export with auto-detection of SendGrid, Mailgun, and SES formats, and RFC 8058 one-click unsubscribe for Gmail/Yahoo bulk sender compliance.
Signed webhooks: Every webhook request is signed with an Ed25519 signature for asymmetric verification.

What you can do

Sending

Transactional and marketing email via POST /v2/email_messages with from, to, cc, bcc, reply_to, subject, html_body, text_body, custom headers, attachments, tags, and metadata
Batch sending up to 50 messages per request with multi-status response
Scheduled sends with cancel
Base64 attachments

Templates

Liquid templates with server-side rendering and preview without sending

Tracking

Real-time webhooks for scheduled, queued, sent, delivered, opened, clicked, bounced, deferred, failed, unsubscribed, complained, and received
Event polling API for services without a public webhook URL
Per-message status and full event history lookup
Account-wide event statistics endpoint

Deliverability, built in

SPF, DKIM, and DMARC generation, DNS drift monitoring, per-provider throttling for Gmail and Outlook
Domain reputation enforcement, domain health summary endpoint
Telnyx operates its own MTA infrastructure as a licensed communications provider

Inbound email

Create inboxes on verified domains with inbound_enabled
Receive inbound messages through email.received webhooks
List, read, and manage inbox messages via API

Suppression and compliance

Two-tier suppression check at API and inject time, soft-bounce escalation
CSV import/export with auto-detection of SendGrid, Mailgun, and SES formats
Unsubscribe management: group-scoped opt-outs and RFC 8058 one-click unsubscribe

Validation and domain auth

Email validation (single and batch), free
Domain authentication with five DNS records (ownership, SPF, DKIM, MX, DMARC)
Open, click, and unsubscribe tracking with per-domain toggles

Pricing

Pay-as-you-go, volume-based. No subscriptions, no minimums.

Customers sending at scale typically save 50-80% versus premium providers like SendGrid, Mailgun, and Postmark. See full pricing.

Getting started

Sign in to the Telnyx portal and navigate to Email.
Add a sending domain, bring your own or use a shared domain.
Complete the five DNS records: ownership, SPF, DKIM, MX, and DMARC.
Start sending with POST /v2/email_messages.


curl -X POST https://api.telnyx.com/v2/email_messages \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "[email protected]",
    "to": ["[email protected]"],
    "subject": "Hello from Telnyx",
    "html_body": "<p>It works!</p>",
    "text_body": "It works!"
  }'