Transactional Email That Never Bounces
Every recipient is validated before delivery. Order confirmations, password resets, and shipping notifications reach real inboxes. Track delivery status in real-time through conditional webhooks.
Every Transactional Email, Delivered
From purchase receipts to security alerts, every message reaches a verified inbox.
Order Confirmations
Instant purchase receipts with order details, line items, and estimated delivery dates.
Password Resets
Secure password reset links delivered within seconds. Time-limited tokens for safety.
Shipping Notifications
Real-time shipment updates with tracking links. Carrier integration ready.
Welcome Emails
First-impression onboarding emails that confirm account creation and guide next steps.
Invoice Delivery
Automated invoice and billing emails with PDF attachments and payment links.
Account Alerts
Security alerts, login notifications, and usage warnings delivered immediately.
Every Recipient Validated Before Delivery
Other ESPs send first and deal with bounces after. MailOdds validates the address before the email leaves our servers.
API Call
Send your email via a single POST request
Validation
Recipient verified via SMTP before sending
Delivery
DKIM-signed email sent to verified inbox
Tracking
Opens, clicks, and conversions reported
Traditional ESPs
- x Send to unverified addresses
- x Bounce back after delivery attempt
- x Sender reputation damaged per bounce
MailOdds
- Validate address before sending
- Invalid addresses rejected at API level
- Zero bounces, reputation protected
Send in One API Call
A single POST request is all it takes. No templates, no configurations, no queue management.
curl -X POST https://api.mailodds.com/v1/send \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"from": "orders@yourstore.com",
"to": "customer@example.com",
"subject": "Your order #1234 has shipped",
"html": "<h1>Shipment confirmed</h1><p>Track: ABC123</p>",
"tags": ["order-confirmation"]
}'Built for the Inbox
Every layer of the sending stack is optimized for deliverability.
DKIM Signing (Ed25519 + RSA)
Dual DKIM signatures for maximum compatibility. Ed25519 for modern receivers, RSA 2048 as fallback.
Domain Warmup
Gradual sending volume increase for new domains. ISP-aware ramp schedules protect your reputation from day one.
ISP-Aware Rate Limiting
Per-ISP throttling that respects provider limits. Gmail, Yahoo, Outlook each get tailored send rates.
Bounce Processing
Automatic hard bounce suppression. Soft bounces retried with exponential backoff. Dead letter queue for failed webhooks.
Engagement Throttling
Dynamic send rate adjustment based on recipient engagement signals. Protect sender score automatically.
TLS Encryption
Opportunistic STARTTLS for every connection. All transactional emails encrypted in transit.
Know When They Read It
Track every transactional email from send to conversion. Know exactly when a customer opens their order confirmation, clicks the tracking link, or visits your storefront.
- Open tracking via invisible pixel
- Click tracking with link rewriting
- Conversion tracking via web pixel
- Real-time webhooks for all events
Event Timeline
Built for Reliability
Transactional email is mission-critical. Our infrastructure is designed for zero downtime.
4 MTA Nodes
Geographically distributed MTA fleet. If one node goes down, others pick up the load automatically.
Dead Letter Queue
Failed webhook deliveries are queued and retried automatically. Nothing gets lost, even during downstream outages.
99.9% Uptime
Blue-green deployments with zero-downtime upgrades. Prometheus monitoring with automated alerting.
Why Transactional Email Needs Its Own Infrastructure
According to Return Path research, mixing transactional and marketing email on the same IP increases transactional delivery failures by 25%, making dedicated infrastructure a requirement for reliable delivery. MailOdds keeps transactional and campaign traffic on separate reputation streams, so a marketing campaign spike never delays a password reset.
The key differentiator is pre-send validation. Before MailOdds delivers any transactional email, every recipient address is verified through real-time SMTP validation, catching invalid addresses before they generate bounces. This is what makes MailOdds a zero-bounce transactional email platform.
According to M3AAWG best practices, transactional emails should maintain a bounce rate below 1% to preserve sender reputation. With pre-send validation eliminating bad addresses at the source, MailOdds customers consistently achieve bounce rates under 0.1%. Delivery events are available in real-time through conditional webhooks for immediate visibility into delivery status.
Frequently Asked Questions
Beyond Transactional Email
Email Sending API
Transactional and campaign email delivery with built-in validation.
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.
Start Sending Transactional Email
Get your API key and start sending in minutes. Every recipient validated, every email delivered.