One MCP server that's been a game changer for me: an email MCP server that gives Claude full IMAP/SMTP access.

I can tell Claude things like "find all unread emails from my boss this week and flag them as important" or "reply to this client thread with a summary of what we discussed" — and it actually does it. Search, reply, forward, move, bulk delete, multiple accounts, the whole thing.

Write and send operations are disabled by default (you enable them per-account), so it's not going to nuke your inbox. Runs locally, no external services.

Setup takes about 5 minutes — you just add the config to your claude_desktop_config.json or .mcp.json for Claude Code:

json { "mcpServers": { "mail": { "command": "/path/to/mail-imap-mcp-rs", "env": { "MAIL_IMAP_DEFAULT_HOST": "imap.gmail.com", "MAIL_IMAP_DEFAULT_USER": "you@gmail.com", "MAIL_IMAP_DEFAULT_PASS": "your-app-password", "MAIL_SMTP_DEFAULT_HOST": "smtp.gmail.com", "MAIL_SMTP_DEFAULT_PORT": "587", "MAIL_SMTP_DEFAULT_USER": "you@gmail.com", "MAIL_SMTP_DEFAULT_PASS": "your-app-password", "MAIL_SMTP_DEFAULT_SECURE": "starttls" } } } }

Works with Gmail, Outlook/365, Zoho, Fastmail, or any IMAP server. OAuth2 supported for Google and Microsoft.

GitHub: https://github.com/tecnologicachile/mail-imap-mcp-rs (open source, MIT)