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Transactional Email Service

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The Transactional Email Service provides scalable and reliable email delivery for your applications. Built on a robust infrastructure, it ensures high deliverability, detailed tracking, and seamless integration with your existing systems. With comprehensive APIs, SMTP support, and advanced features, our service is designed to meet diverse email sending needs.

Whether you're sending order confirmations, password resets, shipping notifications, or automated alerts, our service ensures your critical emails reach their destination. Built on European infrastructure with GDPR compliance at its core, we provide the reliability and control your business needs.

Key highlights:

  • 99.9% uptime SLA - Reliable email delivery when it matters most
  • European infrastructure - GDPR-compliant with data residency in the EU
  • Real-time webhooks - Track every email event from send to delivery
  • Flexible authentication - Support for both SMTP and REST API
  • Advanced features - Click tracking, open tracking, sandbox mode, and more
  • Dedicated support - Expert assistance when you need it

Getting Started View Product Page API Reference

What is the Transactional Email Service?

Transactional Email Service is a powerful email delivery platform designed specifically for sending automated, triggered emails from your applications. Unlike marketing email services, transactional email focuses on one-to-one communications that are essential for your application's functionality.

Perfect for:

  • E-commerce platforms sending order confirmations and shipping updates
  • SaaS applications delivering password resets and account notifications
  • Financial services providing transaction alerts and statements
  • Healthcare systems sending appointment reminders and test results
  • Educational platforms delivering course updates and certificates

Our service handles the complexity of email delivery—including bounce handling, reputation management, and compliance—so you can focus on building your application.

Why choose the Transactional Email Service?

Unmatched reliability Built on redundant infrastructure with automatic failover, ensuring your emails are delivered even during peak loads or system maintenance.

European data sovereignty All infrastructure and data storage located in Europe, ensuring full GDPR compliance and meeting strict data residency requirements.

Developer-friendly integration Comprehensive REST API, SMTP support, and extensive documentation with code examples in multiple languages make integration straightforward.

Advanced tracking and analytics Real-time webhooks for all email events, detailed delivery reports, and customizable tracking options give you complete visibility.

Flexible IP management Choose between shared IPs with established reputation, dedicated IPs for high-volume senders, or bring your own IP addresses.

Enterprise-grade security Two-Factor Authentication, OpenID Connect SSO, scoped credentials, and granular permission controls protect your email infrastructure.

Features

Below, you'll find a comprehensive list of available features.

Sending & Authentication

  • Sending e-mail: SMTP and API credentials, code examples for Curl, PHP, and Python
  • Scoped Credentials: Domain-restricted API tokens and SMTP credentials with granular permissions
  • Domain Management: Add and verify domains for sending and receiving messages

Testing & Development

  • Sandbox mode: Test email implementation without sending actual messages, simulate different delivery outcomes
  • Set a custom "To" header: Override recipient for testing while displaying original address

Tracking & Monitoring

  • Click Tracking: Monitor which links recipients click in your emails
  • Email Open Tracking: Track when recipients open your emails using tracking pixels
  • Webhooks: Real-time notifications about email events including deliveries, opens, clicks, and bounces

Data Management

  • Retention: Configure meta-data and message-data retention settings, object-store integration
  • Suppressions: Automatic suppression of problematic email addresses based on bounce classifications
  • Incoming Routing: Route incoming emails to your systems via webhooks

Account & IP Management

  • Account Settings: Team member management, Two-Factor Authentication, OpenID Connect SSO, Delivery Status Notifications
  • Dedicated IPs: Improve deliverability with dedicated IP addresses for high-volume senders (250k+ emails/month)
  • Bring your own IP (BYOIP): Use your own IP addresses for outgoing email

Reference

  • Miscellaneous: Custom headers reference, common error messages, delivery status tracking

Getting Started

To start sending emails with Transactional Email Service:

  1. Create an account and log in to the App Dashboard
  2. Add and verify your domain in Domain Management
  3. Create sending credentials (SMTP or API) in the Credentials section
  4. Start sending emails using our API or SMTP with your preferred integration method

API Reference

We have two API endpoints available: APIv2 and legacy v1. We recommend using APIv2.

  • API Swagger Documentation for APIv2: https://api.simplemailservice.eu/api-docs-v2/
  • API endpoint for APIv2: https://api.simplemailservice.eu/v2/