Transactional Email That Never Fails
Password resets, order confirmations, shipping updates, account alerts — when users expect an email instantly, SprintMailer delivers. RESTful API, SMTP relay, and webhooks with 99.99% uptime SLA.
Key Features
Everything you need to transactional email effectively, built into one platform.
RESTful API
Clean, well-documented API with SDKs for Node.js, Python, PHP, Ruby, Go, and .NET. Send your first email in under 5 minutes.
Template Engine
Store HTML templates on SprintMailer and send with dynamic variables. Update templates without redeploying your app.
Delivery Webhooks
Receive real-time events for delivered, bounced, opened, and clicked emails. Integrate with your app's event system.
Sub-Second Delivery
Critical emails delivered in under 1 second on average. Priority queue routing for transactional messages.
Inbound Email Parsing
Parse incoming emails and forward structured JSON to your webhook endpoint. Build reply-by-email features easily.
Sandbox Mode
Test your integration without sending real emails. Sandbox captures all messages for inspection and debugging.
Learn More
Dive deeper into how SprintMailer helps you achieve better results.
Built for Applications That Depend on Email
Transactional emails are the backbone of user experience — password resets, email verification, purchase receipts, security alerts. When these fail, users get locked out, orders go unconfirmed, and trust erodes.
SprintMailer's transactional email service is purpose-built for reliability. Separate sending infrastructure, priority queue routing, and automatic retry logic ensure your critical messages arrive every time.
Developer-First API Design
Our API is designed by developers, for developers. Send an email with a single HTTP request:
Full OpenAPI specification, interactive API explorer, and copy-paste code samples in 8 languages. Average integration time: under 30 minutes.
Templates Without the Hassle
Store email templates on SprintMailer and update them without touching your codebase. Use Handlebars-style variables for dynamic content:
Version control for templates with rollback
Preview with test data before publishing
Shared templates across staging and production
Responsive HTML templates included free
Reliability You Can Measure
Track delivery rates, bounce rates, and latency percentiles in real time. Set up alerts when delivery rates drop below your threshold.
Our 99.99% uptime SLA means less than 52 minutes of downtime per year. Status page, incident notifications, and dedicated support for Enterprise customers.
Frequently Asked Questions
Common questions about transactional email.
Related Services
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Integrate transactional email in minutes
Start with 1,000 free emails/month. Full API access, SDKs, and sandbox mode included.
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