Cobb Hayes
a6e0a234d2
Repository URL → git.sulkta.com. Drop Lucy Browserless IPs from tool doc-strings (replaced with abstract 'sandboxed headless browser' guidance). Drop sibling-repo cross-references, kayos@/cobb@ mailbox examples in tool descriptions, vault pointers. Generalize config.example.toml + README to neutral hosts. Add LICENSE (MIT — Cargo.toml already declared it). Tests still green. No behavior change.
80 lines
2.3 KiB
Markdown
80 lines
2.3 KiB
Markdown
# mail-mcp
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Rust MCP server for IMAP/SMTP. SMTP send + IMAP read with RFC-correct headers,
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multipart/alternative when HTML is included, multipart/mixed for attachments,
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threading via `In-Reply-To` / `References`.
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## Tools (v0.1)
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- `mail_send` — `account?`, `to`, `cc[]?`, `bcc[]?`, `subject`, `body`,
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`body_html?`, `attachments[]?`, `in_reply_to?`, `references[]?`.
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Returns `{message_id, sent_at}`.
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- `mail_inbox_list` — newest-first listing. `account?`, `since?` (YYYY-MM-DD),
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`unread_only?`, `limit?` (default 50, max 500), `folder?` (default INBOX).
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Uses `BODY.PEEK` — does not toggle `\Seen`.
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- `mail_inbox_read` — fetch one message by UID. `account?`, `uid`, `folder?`,
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`format?` (`text` | `html` | `raw_eml`). Attachment payloads NOT inlined —
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only `{filename, mime_type, size}` metadata.
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## Outbound headers
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- `Date` — UTC, RFC 5322 (lettre auto)
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- `Message-ID` — `<UUIDv4@<from_addr_domain>>` — own-domain, not the
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container hostname
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- `From` — `name <addr>`
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- `MIME-Version: 1.0`
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- `User-Agent: mail-mcp/<version>`
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- `In-Reply-To` + `References` when threading args present
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- `Content-Type` correct for body shape (text-only / alternative / mixed)
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DKIM-Signature is applied by the relay, not the client.
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## Build
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```
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cargo build --release
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```
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Binary at `target/release/mail-mcp`.
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## Config
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```
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mkdir -p ~/.config/mail-mcp
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cp config.example.toml ~/.config/mail-mcp/config.toml
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chmod 600 ~/.config/mail-mcp/config.toml
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```
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Passwords are never inline. Per account:
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1. read from the env var named in `password_env`
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2. otherwise from `password_file` (shell-format `KEY=VALUE` per line)
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3. hard fail if neither resolves
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## MCP wiring
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```json
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{
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"mcpServers": {
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"mail-mcp": {
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"command": "/usr/local/bin/mail-mcp",
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"args": []
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}
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}
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}
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```
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Logging is stderr-only — stdout is the JSON-RPC transport.
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## Safety
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`mail_inbox_read` returns attacker-controlled bytes. Do NOT auto-fetch URLs
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found in inbound mail — web beacons confirm read and links may be phishing.
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Default deny on every URL; surface as text and wait for explicit per-link
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authorization. If a fetch is authorized, route through a sandboxed headless
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browser rather than `curl` / `WebFetch` from the production host. Attachment
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bytes get the same treatment.
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## License
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MIT — see `LICENSE`.
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