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M
MCP Email
作者 @zavora-ai
GitHub 仓库(1 星标)

Email MCP Server — Gmail and Microsoft Graph for sending, reading, and managing email

创建于 5/24/2026
更新于 about 5 hours ago
README
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Repository documentation and setup instructions

Email MCP Server

Crates.io License ADK-Rust Enterprise Registry Ready

The most complete multi-backend email MCP server. 24 tools across 5 send backends and 3 read backends — send via SMTP, AWS SES, or SendGrid while reading from any IMAP server. File attachments, OAuth with auto-refresh, single Rust binary with enterprise governance.

Architecture

MCP Email Architecture

Key Principles

  • Multi-backend — 5 send + 3 read backends, mix and match freely
  • IMAP-first reading — works with any email provider, no OAuth required
  • SMTP-first sending — universal, works with any relay
  • Full email lifecycle — send, read, reply, forward, draft, organize, batch, delete
  • No credential exposure — tokens stay in env vars, never reach LLM context
  • Single binary — no Node.js, no Python, no runtime dependencies

Comparison with Other Email MCP Servers

| Feature | marlinjai/email-mcp | GongRzhe/Gmail-MCP | Ours | |---------|:---:|:---:|:---:| | Send email | ✅ | ✅ | ✅ | | CC/BCC | ✅ | ✅ | ✅ | | HTML email | ✅ | ✅ | ✅ | | Reply | ✅ (reply-all) | ❌ | ✅ | | Forward | ✅ | ❌ | ✅ | | Drafts (create/list/send) | ✅ | ✅ | ✅ | | Attachments send | ✅ | ✅ | ✅ | | Attachments download | ✅ | ✅ | ✅ (base64) | | Threads/conversations | ✅ | ❌ | ✅ | | Full body retrieval | ✅ | ✅ | ✅ | | Search | ✅ | ✅ | ✅ | | Mark read/unread | ✅ | ✅ | ✅ | | Star/flag | ✅ | ❌ | ✅ | | Move to folder | ✅ | ✅ | ✅ | | Delete (trash/permanent) | ✅ | ✅ | ✅ | | Labels (create/delete) | ✅ | ✅ | ✅ | | Batch operations | ✅ | ✅ | ✅ | | Filters | ❌ | ✅ | ❌ | | Multi-account | ✅ | ❌ | ❌ | | SMTP send | ✅ | ❌ | ✅ | | IMAP read | ✅ | ❌ | ✅ | | AWS SES | ❌ | ❌ | ✅ | | SendGrid | ❌ | ❌ | ✅ | | Registry governance | ❌ | ❌ | ✅ | | Risk classification | ❌ | ❌ | ✅ | | Rust / single binary | ❌ (Node) | ❌ (Node) | ✅ | | Tools | 24 | 18 | 24 |

Tools (24)

Sending & Composing (5)

| Tool | Purpose | Risk Class | |------|---------|------------| | send_email | Send email with CC/BCC, plain text + HTML | External write | | reply_to_email | Reply to an email (preserves threading) | External write | | forward_email | Forward an email to new recipients | External write | | create_draft | Save a draft without sending | Internal write | | send_draft | Send a previously saved draft | External write |

Reading & Searching (6)

| Tool | Purpose | Risk Class | |------|---------|------------| | list_inbox | List inbox messages | Read-only | | get_email | Get email metadata (subject, from, date) | Read-only | | get_email_body | Get full email body (HTML or plain text) | Read-only | | get_thread | Get entire email thread/conversation | Read-only | | search_emails | Search by query (Gmail syntax or IMAP SEARCH) | Read-only | | download_attachment | Download attachment content (base64) | Read-only |

Organization (7)

| Tool | Purpose | Risk Class | |------|---------|------------| | list_labels | List all labels/folders | Read-only | | list_drafts | List saved drafts | Read-only | | get_attachments | Get attachment metadata for an email | Read-only | | move_to_folder | Move email to a folder/label | Internal write | | mark_read | Mark email as read | Internal write | | mark_unread | Mark email as unread | Internal write | | star_email | Star/flag a message | Internal write |

Management (3)

| Tool | Purpose | Risk Class | |------|---------|------------| | delete_email | Trash or permanently delete | Destructive | | create_label | Create a new label/folder | Internal write | | delete_label | Delete a label/folder | Destructive |

Batch Operations (3)

| Tool | Purpose | Risk Class | |------|---------|------------| | batch_delete | Delete multiple emails at once | Destructive | | batch_move | Move multiple emails to a folder | Internal write | | batch_mark | Mark multiple emails read/unread | Internal write |

Backend Status

| Backend | Send | Read | OAuth | Tested | |---------|:---:|:---:|:---:|:---:| | SMTP 465 | ✅ | — | — | ✅ | | SMTP 587 (STARTTLS) | ✅ | — | — | ✅ | | AWS SES | ✅ | — | — | ✅ | | SendGrid | ✅ | — | — | Ready | | Gmail API | ✅ | ✅ | ✅ auto-refresh | ✅ | | Microsoft Graph | ✅ | ✅ | ✅ auto-refresh | Ready | | IMAP | — | ✅ | — | ✅ |

Send Backends (5)

| Backend | Env Vars | Use Case | |---------|----------|----------| | SMTP (default) | SMTP_HOST, SMTP_PORT, SMTP_USERNAME, SMTP_PASSWORD, SMTP_FROM | Any SMTP relay — Postfix, Mailgun, Zoho, Gmail SMTP | | SendGrid | SENDGRID_API_KEY, SENDGRID_FROM | High-volume transactional email | | AWS SES | AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_REGION, SES_FROM | AWS-native workloads | | Gmail API | GMAIL_ACCESS_TOKEN | Google Workspace (OAuth) | | Microsoft Graph | MS_GRAPH_TOKEN | Microsoft 365 (OAuth) |

Priority: SMTP → SendGrid → SES → Gmail → Microsoft

Read Backends (3)

| Backend | Env Vars | Use Case | |---------|----------|----------| | IMAP (default) | IMAP_HOST, IMAP_PORT, IMAP_USERNAME, IMAP_PASSWORD | Any provider — no OAuth needed | | Gmail API | GMAIL_ACCESS_TOKEN | Full Gmail features (threads, labels) | | Microsoft Graph | MS_GRAPH_TOKEN | Full Outlook features (folders, categories) |

Priority: IMAP → Gmail → Microsoft

Common IMAP Hosts

| Provider | Host | Port | |----------|------|------| | Gmail | imap.gmail.com | 993 | | Outlook | outlook.office365.com | 993 | | Yahoo | imap.mail.yahoo.com | 993 | | Fastmail | imap.fastmail.com | 993 | | Zoho | imap.zoho.com | 993 | | iCloud | imap.mail.me.com | 993 | | ProtonMail | 127.0.0.1 (Bridge) | 1143 |

Installation

cargo install mcp-email

Or build from source:

git clone https://github.com/zavora-ai/mcp-email
cd mcp-email
cargo build --release

Configuration Examples

SMTP + IMAP (universal — works with any provider)

export SMTP_HOST="smtp.gmail.com"
export SMTP_PORT="587"
export SMTP_USERNAME="you@gmail.com"
export SMTP_PASSWORD="app-password"
export SMTP_FROM="you@gmail.com"
export IMAP_HOST="imap.gmail.com"
export IMAP_PORT="993"
export IMAP_USERNAME="you@gmail.com"
export IMAP_PASSWORD="app-password"

SendGrid (send) + Gmail API (read)

export SENDGRID_API_KEY="SG.xxxx"
export SENDGRID_FROM="noreply@company.com"
export GMAIL_ACCESS_TOKEN="ya29.xxxx"

AWS SES (send) + IMAP (read)

export AWS_ACCESS_KEY_ID="AKIA..."
export AWS_SECRET_ACCESS_KEY="..."
export AWS_REGION="us-east-1"
export SES_FROM="noreply@company.com"
export IMAP_HOST="imap.gmail.com"
export IMAP_PORT="993"
export IMAP_USERNAME="you@gmail.com"
export IMAP_PASSWORD="app-password"

Client Configuration

Claude Desktop

{
  "mcpServers": {
    "email": {
      "command": "mcp-email",
      "args": [],
      "env": {
        "SMTP_HOST": "smtp.gmail.com",
        "SMTP_PORT": "587",
        "SMTP_USERNAME": "you@gmail.com",
        "SMTP_PASSWORD": "app-password",
        "SMTP_FROM": "you@gmail.com",
        "IMAP_HOST": "imap.gmail.com",
        "IMAP_PORT": "993",
        "IMAP_USERNAME": "you@gmail.com",
        "IMAP_PASSWORD": "app-password"
      }
    }
  }
}

Kiro

Add to .kiro/settings/mcp.json:

{
  "mcpServers": {
    "email": {
      "command": "mcp-email",
      "args": [],
      "env": {
        "SENDGRID_API_KEY": "SG.xxxx",
        "SENDGRID_FROM": "noreply@company.com",
        "IMAP_HOST": "imap.gmail.com",
        "IMAP_PORT": "993",
        "IMAP_USERNAME": "you@gmail.com",
        "IMAP_PASSWORD": "app-password"
      }
    }
  }
}

Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "email": {
      "command": "mcp-email",
      "args": [],
      "env": {
        "SMTP_HOST": "smtp.gmail.com",
        "SMTP_PORT": "587",
        "SMTP_USERNAME": "you@gmail.com",
        "SMTP_PASSWORD": "app-password",
        "SMTP_FROM": "you@gmail.com"
      }
    }
  }
}

Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "email": {
      "command": "mcp-email",
      "args": [],
      "env": {
        "SENDGRID_API_KEY": "SG.xxxx",
        "SENDGRID_FROM": "noreply@company.com"
      }
    }
  }
}

Usage Examples

Send an email with CC

"Send an email to james@company.com, CC sarah@company.com, about the deployment being ready"
→ calls send_email with to, cc, subject, body

Forward an email

"Forward the latest email from the client to the legal team"
→ calls search_emails → forward_email

Draft and review before sending

"Draft a reply to Bob's email but don't send it yet"
→ calls create_draft
"OK send that draft"
→ calls send_draft

Batch organize

"Move all emails from newsletters@company.com to the Archive folder"
→ calls search_emails → batch_move

Read a thread

"Show me the full conversation thread about the budget proposal"
→ calls search_emails → get_thread

Download attachment

"Download the PDF attachment from Sarah's last email"
→ calls search_emails → get_attachments → download_attachment

MCP Server Manifest

server_id = "mcp_email"
display_name = "Email"
version = "1.5.0"
domain = "collaboration"
risk_level = "medium"
writes_allowed = "gated"
transports = ["stdio"]
credentials = ["vault://email-credentials"]
governance_gates = []
environments = ["development", "staging", "production"]

OAuth Setup (one-time)

# Gmail — opens browser for Google consent
mcp-email auth gmail

# Microsoft — opens browser for Microsoft consent
mcp-email auth microsoft

Tokens are saved to ~/.mcp-email/ and auto-refresh before expiry. No manual token management after first auth.

Roadmap

  • [ ] Email filters (create/list/delete rules)
  • [ ] Multi-account support
  • [ ] Webhook for incoming email (SendGrid Inbound Parse)
  • [ ] Email templates (Handlebars/Tera)

Documentation

| Document | Description | |----------|-------------| | API Reference | All 24 tools with parameters, types, and examples | | Backends | Configuration for all 8 backends with setup guides | | Security | Credential handling, threat model, risk classification | | Architecture | System diagram | | CHANGELOG.md | Version history | | mcp-server.toml | ADK-Rust Enterprise registry manifest |

Registry Compliance

This server implements the ADK MCP SDK contract:

  • HealthCheck — async health probe for registry monitoring
  • mcp-server.toml — manifest declaring tools, risk classes, and credentials
  • Structured tracing — RUST_LOG env-filter for observability

Contributors

| jkmaina - MCP Email by zavora-ai
James Karanja Maina | |:---:|

License

Apache-2.0 — see LICENSE for details.

Part of the ADK-Rust Enterprise MCP server ecosystem.

Built with ❤️ by Zavora AI

快速设置
此服务器的安装指南

安装命令 （包未发布）

git clone https://github.com/zavora-ai/mcp-email
手动安装： 请查看 README 获取详细的设置说明和所需的其他依赖项。

Cursor 配置 (mcp.json)

{ "mcpServers": { "zavora-ai-mcp-email": { "command": "git", "args": [ "clone", "https://github.com/zavora-ai/mcp-email" ] } } }
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