Email Sending API
The closed-loop email platform. Every recipient is validated before delivery, every send is authenticated, and every engagement is tracked back to revenue.
Official SDKs for 11 Languages
Enterprise-ready clients with retry, typed errors, and webhook verification
Send Your First Email in Minutes
One endpoint. Clean JSON. Works from any language.
from mailodds import MailOdds client = MailOdds(api_key="mo_live_...") result = client.email_sending.deliver( from_email="you@yourdomain.com", to="customer@example.com", subject="Order Confirmed", html="<h1>Your order is confirmed</h1>", tags=["order-confirmation", "transactional"] ) print(result.message_id)
Everything You Need to Send
Validation, authentication, tracking, and intelligence in a single API.
Built-in Validation
Every recipient validated before delivery. Zero bounces from day one. The core differentiator no other ESP offers.
DKIM Authentication
Ed25519 + RSA dual signing, SPF alignment, DMARC enforcement, and BIMI support. Full authentication out of the box.
Domain Warmup
ISP-tiered rate limiting with engagement-based throttling. Automatic reputation protection for new sending domains.
Email Tracking
Open tracking, click tracking, conversion tracking, and dwell time measurement. Apple MPP handling built in.
Batch and Scheduled
Batch delivery up to 1,000 recipients per request. Scheduled sends with timezone support for optimal delivery windows.
11 SDKs
Python, TypeScript, PHP, Java, Go, C#, Ruby, Kotlin, Rust, Swift, Dart. Enterprise clients with retry and typed errors.
What Makes MailOdds Sending Different
Capabilities that are built in, not bolted on. Most ESPs charge extra for these or skip them entirely.
JSON-LD Structured Data
Your order confirmations show Gmail tracking buttons. Your promos show discount badges. We auto-generate schema.org markup for 27 types, or pass your own. No other ESP does this natively.
A/B Testing
Test subject lines, content, or variants. We pick the winner and send the rest automatically. No manual intervention required.
One-Click Unsubscribe (RFC 8058)
Required by Gmail and Yahoo since Feb 2024. We handle the List-Unsubscribe header and the processing endpoint so you stay compliant automatically.
Dark Mode Variants
Send separate HTML for dark mode email clients. We detect the rendering environment so your design looks right everywhere.
Apple MPP Detection
We identify Apple Mail Privacy Protection opens and filter them from your metrics. Your open rates stay accurate instead of inflated.
Gmail Promotions Annotations
Control how your promotional emails appear in Gmail's Promotions tab with built-in promo card support. Show discount amounts, expiry dates, and product images.
Per-ISP Smart Warmup
Separate sending limits and engagement monitoring for Gmail, Outlook, Yahoo, and others. We adjust volume automatically based on reputation signals from each provider, so you never trip a spam filter during your ramp-up.
The Only Email API That Validates Before Sending
Traditional ESPs let you send to bad addresses and deal with bounces later. MailOdds eliminates the problem at the source.
Traditional ESPs
MailOdds
See What Happens After the Click
A 2KB privacy-first web pixel tracks real purchase signals. No cross-domain tracking, no cookie walls.
Product Dwell
Time spent on product pages after email click-through
Cart Adds
Track add-to-cart events tied to specific email campaigns
Wishlist Saves
Measure purchase intent signals from wishlist activity
Purchases
Revenue attribution from email to checkout completion
Understand What Recipients Mean
AI-powered reply classification turns inbound responses into actionable signals. Route purchase intent to sales, support issues to your help desk, and bounce notifications to your suppression pipeline.
Built for Reliability
Distributed MTA fleet with global coverage and enterprise-grade security.
Frequently Asked Questions
More Than Just Sending
Transactional Email
Order confirmations, password resets, and shipping notifications with zero bounces.
Email Campaigns
A/B testing, scheduling, and post-send analytics with built-in list validation.
Email Webhooks
Conditional rules engine that fires webhooks on specific signal combinations.
Ecommerce Tracking
Full-funnel attribution from email click to purchase with a privacy-first web pixel.
Ready to send with confidence?
Start sending validated emails today. No credit card required. Setup takes 5 minutes.