Service notice

DevInbox is shutting down on 31 December 2026.

Thank you to everyone who used DevInbox to test their emails and give their agents an inbox. Unfortunately, the service never gained the traction it needed to be sustainable, so we have decided to retire it at the end of the year. We're sorry for any inconvenience this may cause.

New sign-ups are closed

We are no longer accepting new accounts.

Existing accounts keep working until 31 December 2026

Dashboard, REST API, SDKs, SMTP, IMAP, webhooks, forwarders and the MCP server all continue to work as today. Nothing changes on your side until the shutdown date.

After the shutdown, all data is deleted

Inboxes, messages, API keys and account data will be permanently deleted. Please move your test suites and agents to another provider and keep a copy of anything you need before then.

Where to go next

Inboxes for AI agents and tests

AgentMail offers a very similar API. For email testing, Mailtrap and MailSlurp are good options.

Regular email on your own domain

FounderMail, from the same team as DevInbox, gives you professional mailboxes for your domain.