Built for Every
Email Sending Scenario
From high-volume marketing campaigns to transactional email, enterprise infrastructure to white-label platforms — PostMTA adapts to your workload. Each use case is backed by production-hardened features and comprehensive API access.
High-Volume Marketing Campaigns
Send millions of messages daily with full visibility into deliverability, engagement tracking, and sender reputation management. PostMTA provides batch sending, real-time open/click tracking, ISP-level analytics, and automated bounce categorization — all backed by a credit management system that ensures you never exceed your sending capacity.
Key Benefits
- Batch API sends up to 100 messages per request for high throughput
- Real-time open and click tracking per message
- ISP-level delivery analytics (Gmail, Outlook, Yahoo, etc.)
- Automated bounce categorization and trend analysis
- Credit system prevents oversending with usage alerts
Transactional Email Service
Password resets, receipts, notifications, and alerts must be delivered instantly and reliably. PostMTA offers low-latency sending with delivery webhooks, queue monitoring, and automatic retry on failure. Health monitoring alerts you before issues impact delivery, ensuring critical messages always reach their destination.
Key Benefits
- Sub-second API response times for single sends
- Delivery webhooks with automatic retry and backoff
- Real-time queue depth monitoring
- Auto-retry with exponential backoff on failure
- Health alerts via email and Slack integrations
Enterprise Email Infrastructure
Complete control over your email infrastructure — IP reputation, warmup schedules, DKIM keys, and sending policies — without relying on third-party ESPs. PostMTA is self-hosted on your own infrastructure with automated vMTA warmup, DKIM key rotation, per-domain sending policies, and custom rate limits.
Key Benefits
- Self-hosted deployment — no third-party dependency
- Automated vMTA warmup schedules and state machine
- DKIM key generation and seamless rotation
- Per-domain sending configurations
- Custom rate limiting per your infrastructure capacity
ESP / Agency White-Label Platform
Launch your own email service with a fully white-label platform. PostMTA provides multi-tenant architecture with org-level isolation, configurable credit packages, and a complete billing system with invoicing and usage rollups. The API-first design enables seamless custom integrations for your brand.
Key Benefits
- Multi-tenant architecture with complete org isolation
- Credit package system for reselling to customers
- Built-in billing with invoice generation
- Usage rollups per organization
- API-first design for custom integrations
Developer API Platform
A programmable email infrastructure with 71+ REST endpoints, flexible authentication options, webhook integrations, and detailed logging for debugging. PostMTA supports JWT and API key authentication, a full webhook system with delivery logs and event filtering, comprehensive analytics, and CSV export capabilities.
Key Benefits
- 71+ REST API endpoints for complete programmatic control
- JWT + API key dual authentication options
- Webhook system with delivery logs and retry
- CSV export for external analysis and reporting
- Rate limiting with standard headers (600 req/min)
Find Your Use Case
Not sure which setup fits your needs? Contact us and we will help you design the right architecture for your email infrastructure.