Reliable Email Delivery
at Scale
The developer-first API for transactional and marketing emails. Send your first email in 5 minutes — no infrastructure to manage, no deliverability to debug.
import { RelayPost } from 'relaypost'; const client = new RelayPost(process.env.API_KEY); await client.emails.send({ from: '[email protected]', to: '[email protected]', subject: 'Hello World', html: '<strong>It works!</strong>' });
Everything you need to send emails
Built for developers, designed for scale. We handle the complexity so you can focus on your product.
Transactional Email
Send receipts, password resets, and system alerts instantly with our high-throughput API.
Marketing Campaigns
Manage lists, segments, and broadcast updates with ease using our visual campaign builder.
Real-time Analytics
Track opens, clicks, bounces, and delivery rates as they happen with granular logs.
How It Works
1. Verify Domain
Secure your sender identity by adding a few DNS records to your domain provider.
2. Integrate API
Connect via SMTP or our REST API using your favorite language SDK in minutes.
3. Send & Monitor
Start sending emails immediately and watch your delivery stats live on the dashboard.
Simple, transparent pricing
Start for free, scale as you grow. No hidden fees.
Free
For hobbyists and side projects.
- 1,000 emails/mo
- Unlimited domains
- 30-day data retention
Starter
For growing side projects.
- 10,000 emails/mo
- Unlimited domains
- 60-day data retention
- $1.50/1K overage
Pro
For startups and growing teams.
- 100,000 emails/mo
- Unlimited domains
- 180-day data retention
- $0.80/1K overage