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E-Commerce & Billing DispatchZero Queue Lag · PDF Receipts

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.

3,000 emails/month freeZero credit card requiredSub-20ms edge latency
202 Accepted
Dispatch Speed
Queued durably before any provider call
SPF · DKIM · DMARC
Authentication
Aligned on every send
6,000/mo
Free Quota
Custom domains included
Developer Ergonomics

Drop into your application in under 60 seconds

Native typed interfaces with zero unnecessary dependencies. Built for standard fetch and modern edge runtimes.

$npm install sadasend
routes/checkout-webhook.ts
typescript
TYPESCRIPT
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.

Core Infrastructure

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.

Architectural Comparison

SadaSend vs Legacy SMTP Postfix / Shared Web Hosting

Why e-commerce stores replace default WordPress/PHP mail with SadaSend high-speed transactional email.

Feature & CapabilitySadaSendLegacy SMTP Postfix / Shared Web Hosting
Checkout Queue DelaysOne API call; never blocks the checkout threadBlocks checkout thread during SMTP handshake
Blacklist ProtectionIsolated reputation poolShared IP easily blacklisted by noisy neighbors
Custom DKIM & SPF SigningRequires complex manual server setup
Base64 PDF Invoice AttachmentsFrequently fails file size limits
Real-Time Delivery Webhooks
Free Tier Volume6,000 sends foreverZero support or monitoring
Forever Free Tier
Transparent Economics

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.

3,000 dispatches monthly forever with zero credit card
All safety gates, allowlists, and velocity limits included
Scale seamlessly: Starter ($12/mo for 10k), Pro ($19/mo for 50k), Scale ($79/mo for 250k)
Free Developer Plan
$0 / mo

No credit card required

Create Free AccountCompare all paid plan tiers
Frequently Asked Questions

Everything you need to know about order notification email

Clear, transparent answers on deliverability, API authentication, and rate limits.

Yes. SadaSend supports base64-encoded file attachments up to 10MB per email, allowing you to attach generated invoice PDFs, receipts, and order tickets directly.
Technical Deep Dives

Related developer guides and architectural tutorials

Explore step-by-step production implementation blueprints, benchmarks, and protocols.