SendPorterOur Mission & Principles
Every Email Carried With a Receipt
SendPorter was built on a simple conviction: critical user communication—password resets, purchase confirmations, verification codes, and invoice receipts—deserves the exact same tracking transparency as physical courier shipping.
The Problem With Legacy Email SaaS
For two decades, web developers accepted an uncomfortable status quo. You dispatched an HTTP POST request to a legacy email provider, received a 200 OK status code, and hoped for the best. When an end user complained that a password reset never arrived, engineers were left combing through opaque webhook logs or waiting hours for third-party support tickets.
Worse, multi-tenant email platforms placed customers on shared IP pools alongside unvetted senders. A single bad actor blasting cold marketing email could cause major mailbox providers (Gmail, Microsoft 365, Yahoo) to rate-limit or defer an entire IP pool, dragging down your mission-critical authentication messages with it.
SendPorter was engineered from the ground up to replace this broken model with accountability, complete reputation isolation, and Bring Your Own Cloud (BYOC) infrastructure.
Our Core Engineering Pillars
Parcel-Style Delivery Tracking
Every message processed by SendPorter receives a unique parcel tracking code (SP-YYYY-XXXX). Track exact timestamps for API acceptance, hardware-backed 2048-bit DKIM signature generation, upstream MX handshakes, and final mailbox delivery receipts.
Bring Your Own Cloud (BYOC)
Connect your sending domain directly to your dedicated AWS SES identity. Keep recipient email addresses, message payloads, and audit logs within your own AWS cloud perimeter, achieving total data sovereignty for GDPR, HIPAA, and SOC 2 compliance.
Zero-Trust Security & IP Controls
API keys should never be valid from any random IP on the internet. SendPorter enforces IP and CIDR allowlists per API key and per domain, ensuring compromised environment variables cannot be abused outside your production VPC.
Developer Ergonomics
Sub-50ms REST APIs, official SDKs for Python, Node.js, and PHP, drop-in SMTP relay on port 587, and real-time HMAC-signed webhooks for 9 message lifecycle events. Zero bloat, zero marketing spam tools.
How We Protect Your Deliverability
SendPorter does not allow cold outbound sales campaigns or unvetted newsletter lists. Every sending organization undergoes rigorous verification before approval. We enforce strict domain authentication protocols:
- Automated 2048-bit DKIM Keypairs: Generated on isolated hardware modules with AES-GCM envelope encryption.
- Strict SPF & DMARC Alignment: Built-in DNS verification ensures your visible From address matches cryptographic envelope headers.
- Intelligent Rate Shaping: Adaptive queue workers pace outbound socket connections to Gmail and Yahoo to eliminate 421 transient deferrals.
- Instant Suppression Filtering: Hard bounces (5xx) and spam complaints are automatically suppressed at intake to protect domain reputation.
Deliver transactional email with confidence
Get started free with 2,500 emails per month, or connect your existing AWS account with BYOC.