· 19 min read
The Postmark alternative for AI agents
Postmark's inbound is genuinely good: it parses incoming mail to clean JSON and POSTs it to your webhook. But it was built for transactional sending under manual account review, inbound sits behind the Pro plan, and the payload has no signature or SPF/DKIM verdict for an agent to trust. MailKite (which we build) gives an agent its own inbox on the free tier, a signed webhook with an auth block, and an optional built-in agent runner. For developers wiring an autonomous agent to email.