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Public Mailbox

The Public Mailinator system (i.e. every possible email address @mailinator.com) creates inboxes when emails arrives for them. All inboxes and emails are in the public domain. They are readable and delete-able by anyone. By design, there is NO privacy in the public Mailinator system.

The Public Mailbox is intended for occasional, personal use, quick demos, experiments, and non-sensitive testing. It requires no sign up and anyone can use this free public service.

Do not send secrets, production credentials, customer data, private tokens, or sensitive workflow data to Public Mailinator inboxes. If your tests need privacy, repeatability, API automation, private-domain identities, or CI/CD access, use Private Mailbox. Public inboxes are the zero-setup surface of Mailinator; private domains are the recommended path for serious automated testing and agent workflows.

In addition, all emails in the Public Mailbox:

  1. Auto-delete after a few hours. (They are un-retrievable after this happens.)
  2. May not contain attachments (if an attachment is sent, it will either not be delivered, or have the attachments stripped before delivery).
  3. Contains usage limits
  4. May be filtered or blocked when required for legal, compliance, or abuse-prevention reasons.

Simply go to the home page and enter an inbox name (i.e. anything you wish up to 50 characters) to check a particular inbox.

When you need something more capable and private, or you want to gain access to our powerful API, SDKs, webhooks, SMS testing, Universal IDP public/private modes, CLI, or MCP tooling, Mailinator offers Private Mailboxes starting $0/month.

Please see our plans for additional usage or signup for a free account.