Introduction to Postscale

Postscale is a complete email infrastructure platform that combines transactional email delivery, inbound email processing, and privacy-focused masked emails in a single, unified API.

Why Postscale?

Building email functionality typically requires multiple services:

• Sending: SendGrid, Postmark, or Mailgun for transactional delivery
• Receiving: Custom SMTP servers or inbound parsing services
• Privacy: Separate alias services like SimpleLogin or Firefox Relay

Postscale brings everything together in one platform with a single API, one dashboard, and one billing relationship.

Core Products

Postscale Send

High-deliverability transactional email delivery with:

• Simple REST API for sending emails
• Automatic SPF, DKIM, and DMARC configuration
• Real-time delivery tracking and analytics
• Template management with dynamic variables
• Dedicated IP addresses (on higher plans)

Postscale Receive

Inbound email processing via webhooks:

• Parse incoming emails to JSON
• Extract headers, body, and attachments
• Route emails based on custom rules
• Thread detection and spam filtering
• Sub-100ms webhook delivery

Postscale Shield

Privacy-focused masked email addresses:

• Generate unique email aliases per user
• Forward emails while hiding real addresses
• Reply from masked addresses
• Per-alias enable/disable controls
• Optional PGP encryption

Key Features

Getting Started

Ready to start? Here's what to do next:

1. Create an account and get your API key
2. Follow our Getting Started guide to send your first email
3. Explore the API Reference for detailed endpoint documentation