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Mailbux

Real business mailboxes for your bots: read, search, label, draft and send email with a Mailbux app password.

Overview

Mailbux gives your bots 12 tools and 4 skills. Paste your own Mailbux app password once. It is stored encrypted and only your workspace uses it.

Plans and limits

  1. FreeIncluded
  2. MCP onlyIncluded
  3. ProIncluded
  4. MaxIncluded

Included on every plan, Free too.

Mailbux questions

How do I connect Mailbux to Krypton?

Open Integrations in Krypton, find Mailbux and choose Connect, then paste your app password. Every bot in the workspace can then use it, and you choose which bots get which apps.

Which plan includes Mailbux?

Included on every plan, Free too.

Can I use Mailbux from Claude or Cursor?

Yes. Connect it in your workspace, then add https://mcp.krypton.bot as a streamable HTTP MCP server with your kmcp_ workspace key. Included on every plan, Free too.

Tools

12 tools your bot can call in Mailbux. It asks before anything hard to undo.

  • List accountsList the Mailbux mailboxes connected to this workspace (addresses only)
  • List mailboxesList the mailbox's folders (Inbox, Sent, Drafts
  • List recentThe newest emails in one mailbox (default Inbox)
  • Read emailRead one email: headers, plain text body and attachment names
  • Read threadEvery email in a conversation, oldest first, as summaries
  • Create draftSave a draft in Drafts (nothing is sent)
  • LabelAdd or remove labels: `add_mailboxes`/`remove_mailboxes` file an email in more than one…
  • MarkMark emails read or unread, and flagged or not
  • MoveMove emails into one mailbox (they leave every other mailbox)
  • SearchSearch email, newest first
  • SendSend an email from the mailbox (saved to Sent)
  • TrashMove emails to Trash

Skills

Ready-made instructions your bots follow with Mailbux. Ask for one by name or let the bot pick.

  • Mailbux inbox triageUse when the user wants a Mailbux inbox sorted into needs a reply, read later and done
  • Mailbux reply draftsUse when the user wants replies prepared for waiting Mailbux emails
  • Mailbux follow upsChase unanswered Mailbux emails; finds sent mail with no reply after a few days and drafts…
  • Mailbux daily digestA morning summary of the last day of Mailbux email: important messages
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