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Getting started

Create your account, secure it, connect a domain and make your first mailbox.

This guide takes you from a new account to a working inbox on your own domain. Most people are done in 15 to 30 minutes, plus some waiting for DNS.

1. Create your account

  • You sign up with the address you already use (for example Gmail or Outlook). Every account starts as a trial with a small credit: connect your own domain and create mailboxes on it.
  • Mailboxes are always on your own domain. centomail does not hand out @centomail.com addresses.

2. Secure your account

Before you connect anything, open Settings → Security:

  1. Turn on two-factor authentication with an authenticator app, or add a passkey.
  2. Save your recovery codes somewhere safe, such as your password manager.
  3. Check your recovery address. It must not be on a domain you are about to connect, otherwise a broken domain could also break your recovery.

3. Connect your domain

Open Domains → Add domain and type your domain name. The dashboard shows:

  • where your DNS is hosted and whether mail is already handled somewhere else;
  • the records to add, with copy buttons, and a live check of each one.

Add them at your DNS provider, or let your AI agent add them with its own DNS access (we never write to your DNS). Connecting your domain explains every record.

If your domain already receives mail somewhere else (Gmail, Microsoft 365, your web host), do not change the MX records yet. Import your mail first, see Migrating from Gmail or Migrating from Microsoft 365.

4. Create your addresses

Once the domain is verified, add the addresses you want:

  • a main address, such as you@yourdomain.com;
  • aliases for things like hello@, shop@ or domains@;
  • optionally a catch-all, so any address on the domain reaches you.

See Using aliases and catch-all.

5. Read and send

When you reply to a message, centomail automatically sends from the address it was sent to.

6. Optional extras

  • Connect your password manager to create an alias for every new login: Bitwarden setup.
  • Automate things with the API.
  • Connect an AI agent that can search, draft and, only if you allow it, send: MCP guide.