Getting Started

What is AgentMail?
How AgentMail compares to Resend, SendGrid, and other email providers.
What can I do with an inbox?
CC, BCC, forwarding, threading, attachments, labels, IMAP, and more.
Creating your first inbox
Get up and running with your first AgentMail inbox.
Getting your API key
How to create and manage your API keys.

Agent Patterns

Handling inbound emails
Webhooks vs WebSockets vs polling for receiving emails.
Allowlists & blocklists
Control who can send to and receive from your inboxes.
Managing threaded conversations
Build agents that maintain context across email threads.
Human-in-the-loop workflows
Add human review and approval steps to your agent workflows.
Pods for multi-tenant email
Isolate inboxes and data across tenants with Pods.
Using labels to track state
Use labels to manage agent workflow state on emails.

Rate limits
Understand AgentMail’s rate limits and how to work within them.
Preventing duplicate sends
Use idempotency to avoid sending the same email twice.
Domain not verifying
What to do when your domain verification is stuck.
Emails bouncing
Diagnose and resolve email bounce issues.
Email spoofing protection
How AgentMail protects your inboxes from unauthenticated senders.

Step-by-step instructions for verifying your domain with popular DNS providers.