Policy Notice: TransactionalRelay is a transactional email infrastructure provider only. We strictly prohibit unsolicited bulk or marketing emails.
Infrastructure ยท Transactional Only

Secure, Compliant
Transactional Email
Delivery

We provide secure and compliant transactional email delivery for SaaS platforms. Purpose-built infrastructure for account notifications, password resets, receipts, and system alerts โ€” not marketing.

CAN-SPAM Compliant
GDPR Aligned
TLS Encrypted
US-Based Infrastructure
POST /v1/email/send
{
  "to": "user@example.com",
  "from": "noreply@app.example.com",
  "subject": "Your receipt โ€” Order #4921",
  "type": "transactional",
  "template_id": "tmpl_receipt_v2",
  "vars": {
    "order_total": 149.00,
    "items_count": 3
  }
}

// Response
{ "status": "queued",
  "message_id": "msg_9Kx2mP...",
  "deliverability_score": 99.2 }
99.97%
Delivery Rate (target SLA)
<200ms
Average API Response Time
0.01%
Complaint Rate Threshold
US-Only
Infrastructure Jurisdiction

Transactional Email Infrastructure Explained

Transactional emails are messages triggered by a specific user action or system event within your application. Unlike marketing or promotional email, transactional messages are expected, time-sensitive, and recipient-specific.

TransactionalRelay provides the SMTP relay and REST API infrastructure to deliver these messages reliably, securely, and in compliance with all applicable regulations.

We do not support: marketing newsletters, bulk email campaigns, cold outreach, promotional broadcasts, or any unsolicited messaging.

Supported Use Cases
๐Ÿ”
Password Resets & Account Security
User-initiated authentication events
๐Ÿงพ
Order Confirmations & Receipts
E-commerce and billing notifications
โœ…
Email Address Verification
Registration opt-in confirmation
๐Ÿ””
System & Application Alerts
Infrastructure monitoring notifications
๐Ÿ“ฆ
Shipping & Delivery Updates
Status-driven logistics notifications
๐Ÿ’ณ
Invoice & Payment Notifications
SaaS billing and subscription events

Infrastructure Built for Reliability

Every component is engineered for high-deliverability, security, and compliance with ISP and regulatory requirements.

SMTP Relay & REST API

Flexible integration via authenticated SMTP relay or our JSON REST API. Both support TLS 1.2+ encryption in transit.

Bounce & Complaint Processing

Automated handling of hard bounces, soft bounces, and ISP feedback loop complaints with suppression list enforcement.

IP Reputation Management

Dedicated IPs with warmup protocols, reputation monitoring across major blocklists, and proactive ISP relationship management.

Monitoring & Logging

Comprehensive delivery event logs, open tracking (where permitted), per-message status, and alerting on deliverability degradation.

Rate Limiting Controls

Configurable send rate limits per account and per domain to prevent accidental high-volume sends and maintain queue health.

DKIM / SPF / DMARC Support

Full support for email authentication standards including DKIM signing, SPF alignment, and DMARC policy enforcement.

CAN-SPAM Compliant
US commercial email law compliance
GDPR Aligned
EU data protection regulation
Abuse Monitoring
Real-time complaint rate enforcement
TLS Encryption
All connections require TLS 1.2 or higher

Ready to Deploy Compliant Email Infrastructure?

Access is granted after a review of your use case to ensure alignment with our transactional-only policy.

Request Access Review