RelayPulse
Next-Gen Transactional Email Architecture

Reliable email
infrastructure for your applications.

Send transactional emails, OTPs, notifications, and system alerts through a lightning-fast REST API or Postfix-compatible SMTP relay with deep event observability.

Start Sending Free View Documentation
2048-bit DKIM
<100ms Latency
TLS 1.3 / STARTTLS
POST /api/v1/emails 
curl -X POST https://relaypulse.io/api/v1/emails \
  -H "Authorization: Bearer rp_live_••••••••" \
  -H "Content-Type: application/json" \
  -d '{
    "from": { "email": "auth@yourdomain.com", "name": "Security" },
    "to": [ { "email": "user@example.com" } ],
    "subject": "Your Login Verification Code",
    "html": "<h1>Code: 849204</h1>",
    "open_tracking": true
  }'
Response (202 Accepted): { "status": "queued", "id": "msg_9f8e7d6c" }

99.98%

Inbox Placement Rate

< 85ms

Average API Dispatch

2048-bit

RSA Automated DKIM

0

Dropped Packets SLA

Engineered for Reliability

Everything developers need for mission-critical email

From high-speed OTP delivery to deep message telemetry, RelayPulse handles the complex mail transfer layer so you don't have to.

Dual API & SMTP Access

Plug directly into our REST API or point your existing WordPress, Postfix, or framework mailer to our secure STARTTLS SMTP server.

Real DNS Verification

Automated 2048-bit RSA DKIM key generation, SPF validation, and DMARC alignment testing ensure your sender reputation remains pristine.

Deep Telemetry & Logs

Inspect the full lifecycle of every email: queueing, Postfix dispatch, recipient SMTP server responses, opens, clicks, and bounces.

Signed Webhook Streams

Receive real-time HMAC-SHA256 signed event webhooks for deliveries, opens, clicks, hard bounces, and spam complaints with automatic retry backoff.

Automated Suppression

Instantly shields your sender score by automatically dropping sends to previously hard-bounced addresses or unsubscribed contacts.

Mustache Template Engine

Build dynamic transactional templates with mustache placeholders like {{otp}} and {{name}} for effortless variable rendering.

Transparent Pricing

Scale seamlessly from prototype to enterprise

Start free with 3,000 monthly emails. Upgrade anytime as your application grows.

Free

100/day

Ideal for personal projects, staging environments, and early prototypes.

Free
  • 100 emails/day
  • 3,000 emails/month
  • 2 Sender Domains with DKIM
  • 3 Scoped API Keys
  • Community Support
  • 7-day Log Retention
Start Free
Most Popular

Starter

500/day

Perfect for growing SaaS startups, web apps, and modern digital platforms.

$19.00 /month
  • 500 emails/day
  • 15,000 emails/month
  • 5 Sender Domains with DKIM & DMARC
  • 10 Scoped API Keys
  • Webhooks & Real-time Delivery Events
  • 30-day Log Retention
  • Priority Email Support
Choose Starter

Pro

1,000/day

High-throughput infrastructure for scale-ups and mission-critical apps.

$49.00 /month
  • 1,000 emails/day
  • 30,000 emails/month
  • 20 Sender Domains
  • 50 Scoped API Keys
  • Dedicated Sub-account Isolation
  • 90-day Deep Log Observability
  • 24/7 SLA & Live Support
Choose Pro

Ready to upgrade your email delivery?

Create your account in under 60 seconds. No credit card required to start sending.

Get Started with RelayPulse