low-latency transactional email API for Australian SaaS and startups
OTPs, receipts and agent email with Australian Privacy Act and Spam Act 2003 compliance.
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';
// Accepted and queued on the call; delivery is asynchronous
const sadasend = new SadaSend(process.env.SADASEND_API_KEY!);
export async function sendAuCustomerReceipt(order: { email: string; total: string }) {
const result = await sadasend.emails.send({
from: 'Accounts <accounts@yourdomain.com.au>',
to: order.email,
subject: 'Tax Invoice & Receipt (AUD)',
html: `<p>Thank you for your payment of ${order.total} AUD (includes 10% GST).</p>`,
tags: ['invoice', 'au-region']
});
console.log('Accepted, message id:', result.id);
return result;
}Accepted on the API call and queued durably, with automated Australian GST invoice formatting.
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.
Australian GST Invoicing
Avoid the punishing 250ms trans-Pacific latency of US servers. Process and deliver emails locally across Australia and New Zealand.
Privacy Act 1988 & APPs Compliant
Strict adherence to Australian Privacy Principles (APPs) governing customer data retention, encryption, and protection.
Spam Act 2003 Identification
Automated sender identification and one-click functional unsubscribe facilities compliant with ACMA enforcement guidelines.
AUD Billing via Paddle
Pay in Australian Dollars (AUD) with clear 10% GST line items, business ABN validation, and zero currency conversion fees.
Autonomous AI Agent Guardrails
Protect production domains with per-key recipient allowlists, hourly send velocity limits, and human approval modes.
6,000 Free Monthly Sends
Complete developer access with custom .com.au domain DKIM signing, webhook event streaming, and analytics included.
SadaSend vs US-Hosted Legacy ESPs
Why Australian software teams migrate from US-hosted mailers to SadaSend local edge infrastructure.
| Feature & Capability | SadaSend | US-Hosted Legacy ESPs |
|---|---|---|
| Ingestion | One HTTPS call, then queued durably | 220ms–350ms trans-Pacific ping |
| Australian Privacy Principles DPA | Generic US-law contracts only | |
| AUD Billing with GST & ABN | Forced USD billing with FX markup | |
| AI Agent Guardrails & Allowlists | ||
| low-latency OTP Password Resets | Frequent lag spikes over trans-ocean links | |
| Free Tier with Custom Domain | 6,000 sends forever | Trial expiration or 100/day limit |
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 transactional email API Australia
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.
Model Context Protocol (MCP) Server
Connect AI agents directly to SadaSend via Model Context Protocol (MCP). Inspect tools, configure execution scopes, and enable human approval holds.
SPF, DKIM and DMARC: what each one actually does
Three records, endlessly confused with each other. Here is the mental model that makes them stop being confusing, and the two mistakes that cause most failures.
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.
Dedicated IP vs Shared IP for Email: When Do You Actually Need One?
Think a dedicated IP will magically fix your deliverability? If you send under 100,000 emails a month, a dedicated IP will actually hurt your inbox placement. Here is the math.
Email Threat Modeling for SaaS: Preventing Compromised API Key Abuse
What happens when an engineer accidentally commits an email API key to a public GitHub repo? Here is the threat model and defense blueprint.