Postmark is a transactional email service designed to help businesses send and track emails reliably and efficiently.
Enhance your email communications with AI agents that can automate responses, personalize content, and ensure timely delivery of critical messages.



Postmark ensures reliable delivery of transactional emails with industry-leading deliverability rates. Relevance AI transforms this into intelligent communication by enabling AI agents that can automate responses, personalize content, and trigger context-aware notifications.
Seamless Communication Orchestration
The agent automates email interactions, ensuring timely and relevant communication.
Dynamic Content Personalization
Utilizes user data to tailor email content, enhancing engagement and relevance.
Real-time Response Automation
Enables instant replies to customer inquiries, improving satisfaction and efficiency.
Relevance AI gives you access to Postmark's email delivery capabilities within your automated workflows and AI agents.
What you’ll need
You don't need to be a developer to set up this integration. Follow this simple guide to get started:
- A Postmark account
- A Relevance AI account with API access
- Authorization credentials (you'll connect securely using API tokens—no sensitive info stored manually)
Security & Reliability
The integration uses secure OAuth authentication, ensuring only authorized workflows access your Postmark email data. Relevance AI handles API operations (like GET, POST, PUT, DELETE) in the background—so you don't have to worry about authentication tokens, request formatting, or rate limits.
Built-in validation and error handling ensure your email workflows run smoothly, even when dealing with different message formats and attachments.
No training on your data
Your data remains private and is never utilized for model training purposes.
Security first
We never store anything we don’t need to. The inputs or outputs of your tools are never stored.

Best Practices for Non-Technical Users
To get the most out of the Postmark + Relevance AI integration without writing code:
- Configure email templates: Set up reusable Postmark templates for consistent messaging.
- Monitor delivery metrics: Use Postmark's tracking features to ensure optimal email performance.
- Validate authentication: Double-check API tokens and permissions are correctly configured.
- Handle responses properly: Implement proper error handling for failed email deliveries.
- Respect rate limits: Batch email sends and space out requests to avoid hitting API limits.