Real-time order confirmations and purchase receipts delivered in milliseconds
Keep buyers informed the instant checkout finishes. Send branded order receipts, shipping updates, and PDF invoices with guaranteed inbox delivery and synchronous confirmation.
Drop into your application in under 60 seconds
Native typed interfaces with zero unnecessary dependencies. Built for standard fetch and modern edge runtimes.
import { SadaSend } from 'sadasend';
const sadasend = new SadaSend(process.env.SADASEND_API_KEY);
export async function handleOrderCompleted(order: {
id: string;
customerEmail: string;
total: string;
items: Array<{ name: string; price: string }>;
}) {
return await sadasend.emails.send({
from: 'Orders <orders@yourdomain.com>',
to: order.customerEmail,
subject: `Order Confirmation #${order.id}`,
html: `
<h2>Thank you for your order!</h2>
<p>Order Reference: <strong>#${order.id}</strong></p>
<p>Order Total: <strong>${order.total}</strong></p>
<ul>
${order.items.map(i => `<li>${i.name} - ${i.price}</li>`).join('')}
</ul>
<p>We'll notify you as soon as your items ship.</p>
`,
});
}Trigger real-time order confirmation emails from Stripe, Paddle, or custom e-commerce checkout webhooks with zero delay.
Engineered for high deliverability and zero incident risk
Every layer from edge connection pooling to per-key rate limits is designed to keep critical transactional dispatches fast, reliable, and contained.
Instant Checkout Confirmation
Eliminate customer anxiety and support tickets with low-latency API processing that delivers order receipts within seconds of payment.
PDF Invoice & Receipt Attachments
Attach base64-encoded PDF invoices, warranty documents, and packing slips directly to the transaction payload.
Synchronous API Confirmation
Receive an immediate message ID and HTTP 200 response so your backend knows the order receipt was safely ingested.
Staging Sandbox Isolation
Lock development environments with recipient allowlists so automated test checkouts never dispatch receipts to real buyers.
Delivery Status Webhooks
Stream delivery confirmations and soft/hard bounces back to your order management system automatically.
6,000 Free Monthly Sends
Start processing e-commerce orders with enterprise-grade deliverability, custom DKIM keys, and zero monthly fixed costs.
SadaSend vs Legacy SMTP Postfix / Shared Web Hosting
Why e-commerce stores replace default WordPress/PHP mail with SadaSend high-speed transactional email.
| Feature & Capability | SadaSend | Legacy SMTP Postfix / Shared Web Hosting |
|---|---|---|
| Checkout Queue Delays | One API call; never blocks the checkout thread | Blocks checkout thread during SMTP handshake |
| Blacklist Protection | Isolated reputation pool | Shared IP easily blacklisted by noisy neighbors |
| Custom DKIM & SPF Signing | Requires complex manual server setup | |
| Base64 PDF Invoice Attachments | Frequently fails file size limits | |
| Real-Time Delivery Webhooks | ||
| Free Tier Volume | 6,000 sends forever | Zero support or monitoring |
Start with 3,000 emails every month at zero cost
No artificial paywalls on security. Unlike legacy providers that reserve recipient allowlists or dedicated IP pools for high enterprise tiers, every SadaSend account receives full safety controls from day one.
Everything you need to know about order notification email
Clear, transparent answers on deliverability, API authentication, and rate limits.
Related developer guides and architectural tutorials
Explore step-by-step production implementation blueprints, benchmarks, and protocols.
REST API Reference & Endpoints
Complete REST API reference for sending emails, managing API keys, tracking delivery events, and configuring recipient allowlists with low latency.
SMTP relay & framework integrations
Connect existing applications, WordPress, Supabase, Laravel, Django, and Nodemailer to SadaSend via standard SMTP relay with zero code changes.
Micro-SaaS Stack: Supabase, Stripe & SadaSend Guide
Building a SaaS in 2026? Here is how to architect authentication with Supabase, payments with Stripe, and transactional delivery with SadaSend with zero rate limits.
Why your transactional email goes to spam
People assume transactional mail is exempt from filtering because it was requested. Mailbox providers do not know that, and mostly do not care.
Building a transactional email queue on Bun and BullMQ without losing messages
The worst bug an email service can have is not a crash. It is accepting a message, returning 202, and never sending it.
Prevent Staging Email Leaks: Recipient Allowlist Guide
A single test script or database seed in staging can accidentally blast thousands of fake password resets to real customers. Here is how to engineer zero-leak staging pipelines.