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A mailbox is the email identity your agent uses. It owns messages, folders, drafts, scheduled sends, notification settings, task triagers, and agent conversations.

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Address types

Address typeTypical useProvider path
Hosted @mermail.app addressFast setup and agent-owned inboxesCloudflare Email Routing for inbound mail
Custom subdomain addressTeam or product inboxes on your domainResend domain verification and provider routing
Mermail prefers custom subdomains such as support.mail.example.com for custom-domain mailboxes. This avoids changing MX records for a root domain that may already run company email.

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Hosted mailbox rules

Hosted mailbox usernames:
  • Must be 5 to 30 characters.
  • Can include letters, numbers, dots, underscores, and hyphens.
  • Cannot start or end with a separator.
  • Cannot repeat separators.
  • Cannot include reserved terms such as admin, support, security, or mermail.

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Mailbox data

Each mailbox can include:
  • Messages and threads.
  • System folders and user-created folders.
  • Drafts, replies, forwards, and scheduled sends.
  • Attachments.
  • Agent conversations.
  • Telegram and push notification settings.
  • Task triagers for classifying and routing email.

Create a mailbox

Create a hosted mailbox or a mailbox under a verified custom subdomain.