Email Marketing for Developers

Skip Manual Hard
Work, Jump to Automation.

Integrate transactional email, automate, customize & scale your email communication with an application programming interface (API). Connect your user with real-time emails to build a strong relationship.

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Platform capabilities

Everything you need to send at scale

We focus on developer- first infrastructure. Explore what you gonna get at TrueSend.

REST API + SMTP Relay

Send emails through our REST API for advanced automation or use SMTP relay for quick integration with existing systems. Unlock the same deliverability with real-time analytics, tracking, and logs.

Real-Time Webhooks

Receive real-time alerts for opens, clicks, bounces, spam complaints, and unsubscribes with built-in retry logic for reliable event tracking.

Template Engine

Create, update, and send dynamic email templates with personalized content and reusable layouts for faster automated campaigns.

Analytics API

Get real-time analytics via an API-custom dashboard and track delivery, open rates, and engagement to improve results.

SPF / DKIM / DMARC

At TrueSend, easily secure and authenticate your domain to improve inbox delivery and sender trust.

Batch & Bulk Sending

Now send high-volume personalized emails through a single API call. Get smart delivery controls with TrueSend.

📡 Live API reference

Save time & Integrate
In Minutes

With us, developers can modernize their systems using automated email workflows and integrate apps and CRMs through APIs. Now send real-time transactional emails, track engagement data, and build scalable personalized campaigns with better delivery performance.

Retry API requests safely and no more duplicate emails with Idempotent Request Keys
Manage large email data and contact lists easily using Pagination & Filtering
Securely connect apps and platforms to the email API with OAuth 2.0 + API Keys.
Speed up integration, auto-generated API code, and documentation with OpenAPI 3.1 Spec.
Test email workflows safely with Sandbox Mode

Explore Full Docs

Infrastructure status

Built for engineers
Who Demand Reliability

Every email runs through backup delivery systems for maximum uptime. Unveil automatic failover protection, real-time monitoring, and transparent status tracking to keep email delivery stable and uninterrupted.

View live status page

delivery.log · live stream Live

09:41:02[OK]msg_01hx → user@stripe.com · 312ms

09:41:03[OK]msg_01hy → ops@linear.app · 289ms

09:41:05[EVT]webhook open → msg_01hx

09:41:07[OK]msg_01hz → dev@vercel.com · 301ms

09:41:09[WRN]soft bounce → test@example.org retry #1

09:41:10[OK]msg_01ia → hello@supabase.io · 276ms

09:41:11[EVT]webhook click → msg_01hy

09:41:13[OK]msg_01ib → api@railway.app · 294ms

99.97%

Delivery success rate

↑ last 30 days

310ms

Average first delivery

↑ faster than last month

100%

Webhook delivery rate

↑ zero dropped events

0ms

Current incident time

All systems operational

Onboarding flow

Live in under 10 minutes

From zero to sending production email - here's what the setup journey looks like.

Create your account & grab your API key

To create an account, sign up, verify email, and find your live API key in the dashboard. Start without a credit card.

Verify your sending domain

Add DNS records like SPF, DKIM, and DMARC. Our DNS wizard validates each one and flags any issues instantly.

Install the SDK & send a test email

Install the SDK via npm, pip, or Composer. Send your first email in just a few lines of code. Track delivery logs in real time.

Set up webhooks

Register your endpoint URL and start receiving open, click, bounce, and unsubscribe events within minutes for delivery events.

Go live with confidence

Switch from sandbox to live mode, set a warm-up schedule if needed. Monitor everything from the developer dashboard.