Transactional Email API — Reliable Delivery When It Matters Most
Send order confirmation emails, password resets, receipts, and notifications with 99.9% deliverability. Simple transactional email API. Clear documentation. Lightning-fast delivery.
What Are Transactional Emails?
Transactional emails are automated messages triggered by user actions, e.g. password resets, order confirmations, receipts, and account notifications. Unlike marketing emails, transactional emails are expected and time-sensitive. Your customers depend on them.
Account Emails
Password resets, email verifications, two-factor authentication codes, account notifications. The transactional emails that keep your users secure and engaged.
Order Confirmation Emails
Order confirmations, shipping updates, delivery notifications, return confirmations. Keep your customers informed at every step of their purchase journey.
Receipt Emails
Payment receipts, invoices, subscription confirmations, renewal notices. Professional, branded receipts delivered instantly.
Notification Emails
Activity alerts, usage warnings, reminder emails, system notifications. Keep users informed about what matters.
Simple, Powerful Transactional Email API
Our transactional email API is built for developers who value simplicity. Clear documentation, copy-paste examples, and straightforward integration — in any language you prefer.
View DocsClear Documentation
No jargon. No hunting for answers. Our transactional email API documentation is written in plain English with examples that actually work.
Code Examples Ready to Use
Node.js, Python, PHP, Ruby, Go, etc. Whatever you're building with, we've got examples ready to copy and customize.
Copy-Paste Ready
Every code example works out of the box. Change the API key, customize the content, and you're sending transactional emails.
Predictable Responses
Standard REST responses. Consistent error messages. No surprises.
Send Transactional Emails Your Way
Whether you need templated emails, fully custom HTML, or simple plain text, our transactional email API supports every use case.
Template-Based Transactional Emails
Create branded templates in Spreeflo and send them via API with dynamic data. Perfect for consistent, professional order confirmation emails and receipts.
HTML Transactional Emails
Send fully custom HTML when you need complete design control. Perfect for dynamically generated content.
Plain Text Emails
Lightweight text-only transactional emails for simple notifications. Fast, simple, and universally compatible.
Raw MIME
Full control for advanced use cases. Send raw email messages when you need complete flexibility.
Send PDF Attachments with Transactional Emails
Attach PDFs, images, and documents to your transactional emails. Perfect for invoices, receipts, tickets, and reports.
- PDF Invoices:Generate invoices in your system and attach them directly to order confirmation emails. Customers get a professional PDF they can save and print.
- Receipts & Statements:Attach detailed receipts, monthly statements, or transaction summaries. Give customers the records they need with every transactional email.
- Tickets & Boarding Passes:Send event tickets, QR codes, or boarding passes as attachments. Ready to print or display on mobile.
- Reports & Documents:Attach usage reports, contracts, or any document your customers need alongside their notification.
99.9% Transactional Email Deliverability
Transactional emails are mission-critical. We treat them that way. Spreeflo's infrastructure is built for reliability, speed, and inbox placement.
Automatic Authentication
SPF, DKIM, and DMARC configured automatically. We handle the technical setup so your transactional emails land in the inbox.
Bounce Handling
Invalid addresses are automatically suppressed. Keep your sender reputation clean without manual list management.
Email Preprocessing
Branded hostnames for image and link serving, automatic one-click unsubscribe headers — signals that email providers use to classify your emails as high quality.
Reputation Management
Our team actively manages sender infrastructure. Your transactional emails benefit from years of deliverability expertise.
Track Every Transactional Email
Know exactly what happened with every transactional email. Track delivery status, opens, and clicks. Debug issues instantly.
View DocsDelivery Status
Know when every transactional email is delivered to the recipient's mail server. Catch issues before customers complain.
Open Tracking
Optional pixel tracking shows when recipients open your transactional emails. Understand engagement.
Click Tracking
See which links get clicked in your transactional emails. Track engagement across all message types.
Event Logs
Searchable history of every transactional email sent. Find any message instantly and see its full delivery history.
Transactional Email for Every Industry
From SaaS to e-commerce to fintech, Spreeflo's transactional email API handles the messages your customers depend on.
SaaS Companies
Password resets, email verifications, usage alerts, feature announcements, billing notifications. Keep your users engaged with reliable transactional emails.
E-commerce
Order confirmation emails, shipping updates, delivery notifications, return confirmations, review requests. Every touchpoint, automated and reliable.
Fintech
Transaction alerts, security notifications, monthly statements, tax documents. Compliance-friendly, secure, reliable transactional email delivery.
Marketplaces
Buyer notifications, seller alerts, transaction receipts, dispute updates. Keep both sides of your marketplace informed.
Frequently Asked Questions
A transactional email is an automated message triggered by a user action — like a password reset, order confirmation, or account notification. Unlike marketing emails, transactional emails are expected by the recipient and typically time-sensitive.
Common transactional email examples include: password reset emails, order confirmation emails, shipping notifications, account verification emails, payment receipts, and subscription renewal notices.
Transactional emails are triggered by user actions and expected by recipients (order confirmations, password resets). Marketing emails are promotional messages sent to a list. Transactional emails typically don't require opt-in consent since they're part of a service interaction.