Skip to main contentthePurplebox is a modern transactional email delivery platform designed for developers who need reliable, secure, and programmatic email sending.
It provides a simple REST API, SMTP relay, and real-time analytics to help you send, track, and manage transactional emails at scale.
The platform focuses on easy authentication, high deliverability, and team-based collaboration, making it suitable for both small projects and large teams.
API & SMTP Email Delivery
Send emails through a clean HTTP API or via SMTP using API keys.
Each key is can be scoped to a domain for improved security and deliverability.
Domain-Based Authentication
Support for DKIM, SPF, and DMARC to ensure that emails sent from your domain meet the highest deliverability standards.
Team & Permissions System
Work in teams with two simple roles:
Admin - full access to manage domains, API keys, team members
Developer - can send emails and view logs, but restricted from high-risk actions
Real-Time Metrics Dashboard
Monitor email delivery status, open rates, click rates, and bounce rates in real-time through an intuitive dashboard.
Track:
- Total emails sent
- Deliveries, failures, bounces
- Bounce rate
- Recent email history
- Date-filtered analytics
Internal Reputation System
Every sender (customer) builds an internal reputation score based on sending behavior, bounce rates, spam hits, and content quality.
This allows the platform to:
- Delay high-risk emails
- Temporarily block abusive senders
- Automatically suspend accounts with risky behavior
Secure Message Processing
Emails pass through a multi-layer filtering pipeline using Rspamd and internal policies to prevent abuse, maintain IP/domain reputation, and ensure safe sending.
Who It’s For
thePurplebox is ideal for developers and businesses that need a reliable and scalable solution for sending transactional emails, such as:
- Account notifications
- Password resets
- Invoice or receipt emails
- System alerts
- Other automated emails
