Knowledge Base
A collection of answers to frequently asked questions.
How AgentMail compares to Resend, SendGrid, and other email providers.
CC, BCC, forwarding, threading, attachments, labels, IMAP, and more.
Get up and running with your first AgentMail inbox.
How to create and manage your API keys.
Webhooks vs WebSockets vs polling for receiving emails.
Control who can send to and receive from your inboxes.
Build agents that maintain context across email threads.
Add human review and approval steps to your agent workflows.
Isolate inboxes and data across tenants with Pods.
Use labels to manage agent workflow state on emails.
Send emails from your own domain instead of @agentmail.to.
Authenticate your domain for better deliverability.
Troubleshoot and fix spam folder placement issues.
Gradually build sending reputation on a new domain.
Add AgentMail DNS records without breaking existing email.
Connect to third-party warm-up tools before running cold outbound.
Understand AgentMail’s rate limits and how to work within them.
Use idempotency to avoid sending the same email twice.
What to do when your domain verification is stuck.
Diagnose and resolve email bounce issues.
How AgentMail protects your inboxes from unauthenticated senders.
Step-by-step instructions for verifying your domain with popular DNS providers.