DaMail

All your mailboxes on your own server, ready for AI agents.

DaMail is a self-hosted mail hub. It syncs every mailbox you own into one place and adds AI triage and automation. AI agents get scoped, auditable access to it through MCP and a REST API.

The name sounds like dame (だめ), Japanese for “nope”: no agent sends a single email without your OK.

Website · Documentation · Changelog · 简体中文

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Why DaMail

• One inbox for every account. DaMail works with Gmail, Outlook, iCloud, QQ Mail, NetEase 163, Tencent and Alibaba business mail, and any IMAP server. Mail syncs in real time and is threaded and searchable. Changes you make are written back to the mail server.
• AI that works for you. It can sort mail, set priority, write summaries and pull out codes, bills and to-dos. It uses the model you choose: Claude, any OpenAI-compatible API, or a local model. AI is off by default.
• Agents get only the access you grant. Claude Duet, ChatGPT dots, Grok Bot, Meta Muse, Claude Code, Cursor and other agents use credentials issued by DaMail. Each credential covers only the permissions and mailboxes you pick. Mail an agent writes waits for your approval.
• Your data stays with you. You host it yourself. Mailbox credentials are encrypted with your own master key. HTML mail renders in a sandbox with remote images blocked. No third-party service sits in between.

Features

Mail	IMAP IDLE push, Microsoft Graph, threading, cross-folder dedup, CJK-friendly search, rich-text compose, signatures, undo send, scheduled send
AI	Mail analysis (category, priority, needs-reply, summary, extracted info), custom labels suggested from your mail, natural-language search, a chat assistant that cites sources, one-click translation, token usage and cost tracking
Automation	Inbox rules with AI conditions and dry runs, notifications to Bark, WeCom, DingTalk, Feishu, Telegram or a webhook, daily and weekly reports, mail stats, awaiting-reply tracking, follow-up reminders
Subscriptions	Find newsletters you rarely open, sorted by open rate, and unsubscribe in one click (RFC 8058) without visiting the sender's site
Open API	MCP server (Streamable HTTP), REST API, scoped API keys, MCP OAuth for ChatGPT and other clients, HMAC-signed webhooks, audit log

Quick start

You need a machine with Docker and Docker Compose. Then run:

curl -fsSL https://damail.app/install.sh | sh

The installer asks which language to use (简体中文 or English). It then creates damail/, downloads docker-compose.yml, writes a .env with a random MASTER_KEY and database password, and starts DaMail. Open http://localhost:8787 to create the admin account and add your first mailbox.

If you already have a domain, pass it in:

curl -fsSL https://damail.app/install.sh | DAMAIL_PUBLIC_URL=https://mail.example.com sh

Back up damail/.env. Its MASTER_KEY encrypts your mailbox credentials. To upgrade, run the install command again; your .env is left as is, and database migrations run on startup.

The quick start guide covers installer options, manual setup with Docker Compose, HTTPS and reverse proxies.

Connect an AI agent

1. In DaMail, go to Settings → API keys and create a key.
2. Choose its permissions (read, organize, draft, send, automation) and the mailboxes it can use.
3. Add DaMail to your client as shown below.

Claude Code

claude mcp add --transport http damail https://mail.example.com/mcp \
  --header "Authorization: Bearer dm_xxx"

Claude Desktop, Cursor and other MCP clients

{
  "mcpServers": {
    "damail": {
      "type": "http",
      "url": "https://mail.example.com/mcp",
      "headers": { "Authorization": "Bearer dm_xxx" }
    }
  }
}

ChatGPT connects through OAuth. Add https://mail.example.com/mcp as a custom connector, sign in to DaMail, and choose permissions and mailboxes on the consent page. Setup details are in ChatGPT and OAuth.

AI assistants. Proactive assistants such as Claude Duet, ChatGPT dots, Grok Bot and Meta Muse connect the same way, through their custom connector settings with OAuth. Once connected they can brief you on new mail, flag what needs a reply and draft answers for your approval. Setup for each assistant is in AI assistants.

An agent never sees tools it isn't allowed to use. Without the send permission, mail it writes goes to Drafts → Awaiting approval.

Documentation

The full documentation, in English and Chinese, is at damail.app.

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