SERVER

SMTP

Rank #7,930

io.github.ni-c/smtp-mcp

MCP server that sends mail over SMTP, gated behind an allowlist and a human confirmation

4 versions

by ni-c (20 servers)View repository ↗Claim this server

First listed

Sep 3, 2026

Last publish date

Sep 7, 2026

OVERVIEW

SMTP is a Model Context Protocol (MCP) server published by ni-c. It ranks #7,930 of 132,046 servers tracked on MCP Toplist. SMTP is listed across 2 registries — Official MCP and Glama, with 4 tracked versions. It was first listed on Sep 3, 2026 and most recently updated on Sep 7, 2026.

STANDING

#7,930of 132,046 tracked serversTop 10%

Ranks ahead of 124,116 of 132,046 servers on MCP Toplist.

CONNECT

Use SMTP

API keyNeeds credentials

Requires user-supplied configuration before first use — typically an API key, token or connection string set via environment variables.

npm package

claude mcp add smtp-mcp -e "SMTP_HOST=<your SMTP_HOST>" -e "SMTP_PORT=<your SMTP_PORT>" -e "SMTP_TLS=<your SMTP_TLS>" -e "SMTP_USER=<your SMTP_USER>" -e "SMTP_PASSWORD=<your SMTP_PASSWORD>" -e "SMTP_FROM=<your SMTP_FROM>" -e "SMTP_REPLY_TO=<your SMTP_REPLY_TO>" -e "SMTP_ALLOW_SEND=<your SMTP_ALLOW_SEND>" -e "SMTP_ALLOWED_RECIPIENTS=<your SMTP_ALLOWED_RECIPIENTS>" -e "SMTP_MAX_RECIPIENTS=<your SMTP_MAX_RECIPIENTS>" -e "SMTP_MAX_SENDS_PER_HOUR=<your SMTP_MAX_SENDS_PER_HOUR>" -e "SMTP_MAX_MESSAGE_BYTES=<your SMTP_MAX_MESSAGE_BYTES>" -e "SMTP_MAX_ATTACHMENT_BYTES=<your SMTP_MAX_ATTACHMENT_BYTES>" -e "SMTP_ATTACHMENT_DIR=<your SMTP_ATTACHMENT_DIR>" -e "SMTP_ATTACHMENT_TYPES=<your SMTP_ATTACHMENT_TYPES>" -e "SMTP_SIGNATURE=<your SMTP_SIGNATURE>" -e "SMTP_AUDIT_LOG=<your SMTP_AUDIT_LOG>" -e "SMTP_ALLOW_TOOLS=<your SMTP_ALLOW_TOOLS>" -e "SMTP_DENY_TOOLS=<your SMTP_DENY_TOOLS>" -e "SMTP_INSECURE_TLS=<your SMTP_INSECURE_TLS>" -- npx -y @ni-c/smtp-mcp

Replace each placeholder with your own value before saving.

Docker image

claude mcp add smtp-mcp -e "SMTP_HOST=<your SMTP_HOST>" -e "SMTP_PORT=<your SMTP_PORT>" -e "SMTP_TLS=<your SMTP_TLS>" -e "SMTP_USER=<your SMTP_USER>" -e "SMTP_PASSWORD=<your SMTP_PASSWORD>" -e "SMTP_FROM=<your SMTP_FROM>" -e "SMTP_REPLY_TO=<your SMTP_REPLY_TO>" -e "SMTP_ALLOW_SEND=<your SMTP_ALLOW_SEND>" -e "SMTP_ALLOWED_RECIPIENTS=<your SMTP_ALLOWED_RECIPIENTS>" -e "SMTP_MAX_RECIPIENTS=<your SMTP_MAX_RECIPIENTS>" -e "SMTP_MAX_SENDS_PER_HOUR=<your SMTP_MAX_SENDS_PER_HOUR>" -e "SMTP_MAX_MESSAGE_BYTES=<your SMTP_MAX_MESSAGE_BYTES>" -e "SMTP_MAX_ATTACHMENT_BYTES=<your SMTP_MAX_ATTACHMENT_BYTES>" -e "SMTP_ATTACHMENT_DIR=<your SMTP_ATTACHMENT_DIR>" -e "SMTP_ATTACHMENT_TYPES=<your SMTP_ATTACHMENT_TYPES>" -e "SMTP_SIGNATURE=<your SMTP_SIGNATURE>" -e "SMTP_AUDIT_LOG=<your SMTP_AUDIT_LOG>" -e "SMTP_ALLOW_TOOLS=<your SMTP_ALLOW_TOOLS>" -e "SMTP_DENY_TOOLS=<your SMTP_DENY_TOOLS>" -e "SMTP_INSECURE_TLS=<your SMTP_INSECURE_TLS>" -- docker run -i --rm ghcr.io/ni-c/smtp-mcp:0.2.0

Replace each placeholder with your own value before saving.

npm package

[mcp_servers.smtp-mcp]
command = "npx"
args = ["-y", "@ni-c/smtp-mcp"]

[mcp_servers.smtp-mcp.env]
SMTP_HOST = "<your SMTP_HOST>"
SMTP_PORT = "<your SMTP_PORT>"
SMTP_TLS = "<your SMTP_TLS>"
SMTP_USER = "<your SMTP_USER>"
SMTP_PASSWORD = "<your SMTP_PASSWORD>"
SMTP_FROM = "<your SMTP_FROM>"
SMTP_REPLY_TO = "<your SMTP_REPLY_TO>"
SMTP_ALLOW_SEND = "<your SMTP_ALLOW_SEND>"
SMTP_ALLOWED_RECIPIENTS = "<your SMTP_ALLOWED_RECIPIENTS>"
SMTP_MAX_RECIPIENTS = "<your SMTP_MAX_RECIPIENTS>"
SMTP_MAX_SENDS_PER_HOUR = "<your SMTP_MAX_SENDS_PER_HOUR>"
SMTP_MAX_MESSAGE_BYTES = "<your SMTP_MAX_MESSAGE_BYTES>"
SMTP_MAX_ATTACHMENT_BYTES = "<your SMTP_MAX_ATTACHMENT_BYTES>"
SMTP_ATTACHMENT_DIR = "<your SMTP_ATTACHMENT_DIR>"
SMTP_ATTACHMENT_TYPES = "<your SMTP_ATTACHMENT_TYPES>"
SMTP_SIGNATURE = "<your SMTP_SIGNATURE>"
SMTP_AUDIT_LOG = "<your SMTP_AUDIT_LOG>"
SMTP_ALLOW_TOOLS = "<your SMTP_ALLOW_TOOLS>"
SMTP_DENY_TOOLS = "<your SMTP_DENY_TOOLS>"
SMTP_INSECURE_TLS = "<your SMTP_INSECURE_TLS>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

Docker image

[mcp_servers.smtp-mcp]
command = "docker"
args = ["run", "-i", "--rm", "ghcr.io/ni-c/smtp-mcp:0.2.0"]

[mcp_servers.smtp-mcp.env]
SMTP_HOST = "<your SMTP_HOST>"
SMTP_PORT = "<your SMTP_PORT>"
SMTP_TLS = "<your SMTP_TLS>"
SMTP_USER = "<your SMTP_USER>"
SMTP_PASSWORD = "<your SMTP_PASSWORD>"
SMTP_FROM = "<your SMTP_FROM>"
SMTP_REPLY_TO = "<your SMTP_REPLY_TO>"
SMTP_ALLOW_SEND = "<your SMTP_ALLOW_SEND>"
SMTP_ALLOWED_RECIPIENTS = "<your SMTP_ALLOWED_RECIPIENTS>"
SMTP_MAX_RECIPIENTS = "<your SMTP_MAX_RECIPIENTS>"
SMTP_MAX_SENDS_PER_HOUR = "<your SMTP_MAX_SENDS_PER_HOUR>"
SMTP_MAX_MESSAGE_BYTES = "<your SMTP_MAX_MESSAGE_BYTES>"
SMTP_MAX_ATTACHMENT_BYTES = "<your SMTP_MAX_ATTACHMENT_BYTES>"
SMTP_ATTACHMENT_DIR = "<your SMTP_ATTACHMENT_DIR>"
SMTP_ATTACHMENT_TYPES = "<your SMTP_ATTACHMENT_TYPES>"
SMTP_SIGNATURE = "<your SMTP_SIGNATURE>"
SMTP_AUDIT_LOG = "<your SMTP_AUDIT_LOG>"
SMTP_ALLOW_TOOLS = "<your SMTP_ALLOW_TOOLS>"
SMTP_DENY_TOOLS = "<your SMTP_DENY_TOOLS>"
SMTP_INSECURE_TLS = "<your SMTP_INSECURE_TLS>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "smtp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/smtp-mcp"
      ],
      "env": {
        "SMTP_HOST": "<your SMTP_HOST>",
        "SMTP_PORT": "<your SMTP_PORT>",
        "SMTP_TLS": "<your SMTP_TLS>",
        "SMTP_USER": "<your SMTP_USER>",
        "SMTP_PASSWORD": "<your SMTP_PASSWORD>",
        "SMTP_FROM": "<your SMTP_FROM>",
        "SMTP_REPLY_TO": "<your SMTP_REPLY_TO>",
        "SMTP_ALLOW_SEND": "<your SMTP_ALLOW_SEND>",
        "SMTP_ALLOWED_RECIPIENTS": "<your SMTP_ALLOWED_RECIPIENTS>",
        "SMTP_MAX_RECIPIENTS": "<your SMTP_MAX_RECIPIENTS>",
        "SMTP_MAX_SENDS_PER_HOUR": "<your SMTP_MAX_SENDS_PER_HOUR>",
        "SMTP_MAX_MESSAGE_BYTES": "<your SMTP_MAX_MESSAGE_BYTES>",
        "SMTP_MAX_ATTACHMENT_BYTES": "<your SMTP_MAX_ATTACHMENT_BYTES>",
        "SMTP_ATTACHMENT_DIR": "<your SMTP_ATTACHMENT_DIR>",
        "SMTP_ATTACHMENT_TYPES": "<your SMTP_ATTACHMENT_TYPES>",
        "SMTP_SIGNATURE": "<your SMTP_SIGNATURE>",
        "SMTP_AUDIT_LOG": "<your SMTP_AUDIT_LOG>",
        "SMTP_ALLOW_TOOLS": "<your SMTP_ALLOW_TOOLS>",
        "SMTP_DENY_TOOLS": "<your SMTP_DENY_TOOLS>",
        "SMTP_INSECURE_TLS": "<your SMTP_INSECURE_TLS>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

Docker image

{
  "mcpServers": {
    "smtp-mcp": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/ni-c/smtp-mcp:0.2.0"
      ],
      "env": {
        "SMTP_HOST": "<your SMTP_HOST>",
        "SMTP_PORT": "<your SMTP_PORT>",
        "SMTP_TLS": "<your SMTP_TLS>",
        "SMTP_USER": "<your SMTP_USER>",
        "SMTP_PASSWORD": "<your SMTP_PASSWORD>",
        "SMTP_FROM": "<your SMTP_FROM>",
        "SMTP_REPLY_TO": "<your SMTP_REPLY_TO>",
        "SMTP_ALLOW_SEND": "<your SMTP_ALLOW_SEND>",
        "SMTP_ALLOWED_RECIPIENTS": "<your SMTP_ALLOWED_RECIPIENTS>",
        "SMTP_MAX_RECIPIENTS": "<your SMTP_MAX_RECIPIENTS>",
        "SMTP_MAX_SENDS_PER_HOUR": "<your SMTP_MAX_SENDS_PER_HOUR>",
        "SMTP_MAX_MESSAGE_BYTES": "<your SMTP_MAX_MESSAGE_BYTES>",
        "SMTP_MAX_ATTACHMENT_BYTES": "<your SMTP_MAX_ATTACHMENT_BYTES>",
        "SMTP_ATTACHMENT_DIR": "<your SMTP_ATTACHMENT_DIR>",
        "SMTP_ATTACHMENT_TYPES": "<your SMTP_ATTACHMENT_TYPES>",
        "SMTP_SIGNATURE": "<your SMTP_SIGNATURE>",
        "SMTP_AUDIT_LOG": "<your SMTP_AUDIT_LOG>",
        "SMTP_ALLOW_TOOLS": "<your SMTP_ALLOW_TOOLS>",
        "SMTP_DENY_TOOLS": "<your SMTP_DENY_TOOLS>",
        "SMTP_INSECURE_TLS": "<your SMTP_INSECURE_TLS>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "smtp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/smtp-mcp"
      ],
      "env": {
        "SMTP_HOST": "<your SMTP_HOST>",
        "SMTP_PORT": "<your SMTP_PORT>",
        "SMTP_TLS": "<your SMTP_TLS>",
        "SMTP_USER": "<your SMTP_USER>",
        "SMTP_PASSWORD": "<your SMTP_PASSWORD>",
        "SMTP_FROM": "<your SMTP_FROM>",
        "SMTP_REPLY_TO": "<your SMTP_REPLY_TO>",
        "SMTP_ALLOW_SEND": "<your SMTP_ALLOW_SEND>",
        "SMTP_ALLOWED_RECIPIENTS": "<your SMTP_ALLOWED_RECIPIENTS>",
        "SMTP_MAX_RECIPIENTS": "<your SMTP_MAX_RECIPIENTS>",
        "SMTP_MAX_SENDS_PER_HOUR": "<your SMTP_MAX_SENDS_PER_HOUR>",
        "SMTP_MAX_MESSAGE_BYTES": "<your SMTP_MAX_MESSAGE_BYTES>",
        "SMTP_MAX_ATTACHMENT_BYTES": "<your SMTP_MAX_ATTACHMENT_BYTES>",
        "SMTP_ATTACHMENT_DIR": "<your SMTP_ATTACHMENT_DIR>",
        "SMTP_ATTACHMENT_TYPES": "<your SMTP_ATTACHMENT_TYPES>",
        "SMTP_SIGNATURE": "<your SMTP_SIGNATURE>",
        "SMTP_AUDIT_LOG": "<your SMTP_AUDIT_LOG>",
        "SMTP_ALLOW_TOOLS": "<your SMTP_ALLOW_TOOLS>",
        "SMTP_DENY_TOOLS": "<your SMTP_DENY_TOOLS>",
        "SMTP_INSECURE_TLS": "<your SMTP_INSECURE_TLS>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

Docker image

{
  "mcpServers": {
    "smtp-mcp": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/ni-c/smtp-mcp:0.2.0"
      ],
      "env": {
        "SMTP_HOST": "<your SMTP_HOST>",
        "SMTP_PORT": "<your SMTP_PORT>",
        "SMTP_TLS": "<your SMTP_TLS>",
        "SMTP_USER": "<your SMTP_USER>",
        "SMTP_PASSWORD": "<your SMTP_PASSWORD>",
        "SMTP_FROM": "<your SMTP_FROM>",
        "SMTP_REPLY_TO": "<your SMTP_REPLY_TO>",
        "SMTP_ALLOW_SEND": "<your SMTP_ALLOW_SEND>",
        "SMTP_ALLOWED_RECIPIENTS": "<your SMTP_ALLOWED_RECIPIENTS>",
        "SMTP_MAX_RECIPIENTS": "<your SMTP_MAX_RECIPIENTS>",
        "SMTP_MAX_SENDS_PER_HOUR": "<your SMTP_MAX_SENDS_PER_HOUR>",
        "SMTP_MAX_MESSAGE_BYTES": "<your SMTP_MAX_MESSAGE_BYTES>",
        "SMTP_MAX_ATTACHMENT_BYTES": "<your SMTP_MAX_ATTACHMENT_BYTES>",
        "SMTP_ATTACHMENT_DIR": "<your SMTP_ATTACHMENT_DIR>",
        "SMTP_ATTACHMENT_TYPES": "<your SMTP_ATTACHMENT_TYPES>",
        "SMTP_SIGNATURE": "<your SMTP_SIGNATURE>",
        "SMTP_AUDIT_LOG": "<your SMTP_AUDIT_LOG>",
        "SMTP_ALLOW_TOOLS": "<your SMTP_ALLOW_TOOLS>",
        "SMTP_DENY_TOOLS": "<your SMTP_DENY_TOOLS>",
        "SMTP_INSECURE_TLS": "<your SMTP_INSECURE_TLS>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

npm package

{
  "servers": {
    "smtp-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/smtp-mcp"
      ],
      "env": {
        "SMTP_HOST": "<your SMTP_HOST>",
        "SMTP_PORT": "<your SMTP_PORT>",
        "SMTP_TLS": "<your SMTP_TLS>",
        "SMTP_USER": "<your SMTP_USER>",
        "SMTP_PASSWORD": "<your SMTP_PASSWORD>",
        "SMTP_FROM": "<your SMTP_FROM>",
        "SMTP_REPLY_TO": "<your SMTP_REPLY_TO>",
        "SMTP_ALLOW_SEND": "<your SMTP_ALLOW_SEND>",
        "SMTP_ALLOWED_RECIPIENTS": "<your SMTP_ALLOWED_RECIPIENTS>",
        "SMTP_MAX_RECIPIENTS": "<your SMTP_MAX_RECIPIENTS>",
        "SMTP_MAX_SENDS_PER_HOUR": "<your SMTP_MAX_SENDS_PER_HOUR>",
        "SMTP_MAX_MESSAGE_BYTES": "<your SMTP_MAX_MESSAGE_BYTES>",
        "SMTP_MAX_ATTACHMENT_BYTES": "<your SMTP_MAX_ATTACHMENT_BYTES>",
        "SMTP_ATTACHMENT_DIR": "<your SMTP_ATTACHMENT_DIR>",
        "SMTP_ATTACHMENT_TYPES": "<your SMTP_ATTACHMENT_TYPES>",
        "SMTP_SIGNATURE": "<your SMTP_SIGNATURE>",
        "SMTP_AUDIT_LOG": "<your SMTP_AUDIT_LOG>",
        "SMTP_ALLOW_TOOLS": "<your SMTP_ALLOW_TOOLS>",
        "SMTP_DENY_TOOLS": "<your SMTP_DENY_TOOLS>",
        "SMTP_INSECURE_TLS": "<your SMTP_INSECURE_TLS>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

Docker image

{
  "servers": {
    "smtp-mcp": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/ni-c/smtp-mcp:0.2.0"
      ],
      "env": {
        "SMTP_HOST": "<your SMTP_HOST>",
        "SMTP_PORT": "<your SMTP_PORT>",
        "SMTP_TLS": "<your SMTP_TLS>",
        "SMTP_USER": "<your SMTP_USER>",
        "SMTP_PASSWORD": "<your SMTP_PASSWORD>",
        "SMTP_FROM": "<your SMTP_FROM>",
        "SMTP_REPLY_TO": "<your SMTP_REPLY_TO>",
        "SMTP_ALLOW_SEND": "<your SMTP_ALLOW_SEND>",
        "SMTP_ALLOWED_RECIPIENTS": "<your SMTP_ALLOWED_RECIPIENTS>",
        "SMTP_MAX_RECIPIENTS": "<your SMTP_MAX_RECIPIENTS>",
        "SMTP_MAX_SENDS_PER_HOUR": "<your SMTP_MAX_SENDS_PER_HOUR>",
        "SMTP_MAX_MESSAGE_BYTES": "<your SMTP_MAX_MESSAGE_BYTES>",
        "SMTP_MAX_ATTACHMENT_BYTES": "<your SMTP_MAX_ATTACHMENT_BYTES>",
        "SMTP_ATTACHMENT_DIR": "<your SMTP_ATTACHMENT_DIR>",
        "SMTP_ATTACHMENT_TYPES": "<your SMTP_ATTACHMENT_TYPES>",
        "SMTP_SIGNATURE": "<your SMTP_SIGNATURE>",
        "SMTP_AUDIT_LOG": "<your SMTP_AUDIT_LOG>",
        "SMTP_ALLOW_TOOLS": "<your SMTP_ALLOW_TOOLS>",
        "SMTP_DENY_TOOLS": "<your SMTP_DENY_TOOLS>",
        "SMTP_INSECURE_TLS": "<your SMTP_INSECURE_TLS>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "smtp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/smtp-mcp"
      ],
      "env": {
        "SMTP_HOST": "<your SMTP_HOST>",
        "SMTP_PORT": "<your SMTP_PORT>",
        "SMTP_TLS": "<your SMTP_TLS>",
        "SMTP_USER": "<your SMTP_USER>",
        "SMTP_PASSWORD": "<your SMTP_PASSWORD>",
        "SMTP_FROM": "<your SMTP_FROM>",
        "SMTP_REPLY_TO": "<your SMTP_REPLY_TO>",
        "SMTP_ALLOW_SEND": "<your SMTP_ALLOW_SEND>",
        "SMTP_ALLOWED_RECIPIENTS": "<your SMTP_ALLOWED_RECIPIENTS>",
        "SMTP_MAX_RECIPIENTS": "<your SMTP_MAX_RECIPIENTS>",
        "SMTP_MAX_SENDS_PER_HOUR": "<your SMTP_MAX_SENDS_PER_HOUR>",
        "SMTP_MAX_MESSAGE_BYTES": "<your SMTP_MAX_MESSAGE_BYTES>",
        "SMTP_MAX_ATTACHMENT_BYTES": "<your SMTP_MAX_ATTACHMENT_BYTES>",
        "SMTP_ATTACHMENT_DIR": "<your SMTP_ATTACHMENT_DIR>",
        "SMTP_ATTACHMENT_TYPES": "<your SMTP_ATTACHMENT_TYPES>",
        "SMTP_SIGNATURE": "<your SMTP_SIGNATURE>",
        "SMTP_AUDIT_LOG": "<your SMTP_AUDIT_LOG>",
        "SMTP_ALLOW_TOOLS": "<your SMTP_ALLOW_TOOLS>",
        "SMTP_DENY_TOOLS": "<your SMTP_DENY_TOOLS>",
        "SMTP_INSECURE_TLS": "<your SMTP_INSECURE_TLS>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

Docker image

{
  "mcpServers": {
    "smtp-mcp": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/ni-c/smtp-mcp:0.2.0"
      ],
      "env": {
        "SMTP_HOST": "<your SMTP_HOST>",
        "SMTP_PORT": "<your SMTP_PORT>",
        "SMTP_TLS": "<your SMTP_TLS>",
        "SMTP_USER": "<your SMTP_USER>",
        "SMTP_PASSWORD": "<your SMTP_PASSWORD>",
        "SMTP_FROM": "<your SMTP_FROM>",
        "SMTP_REPLY_TO": "<your SMTP_REPLY_TO>",
        "SMTP_ALLOW_SEND": "<your SMTP_ALLOW_SEND>",
        "SMTP_ALLOWED_RECIPIENTS": "<your SMTP_ALLOWED_RECIPIENTS>",
        "SMTP_MAX_RECIPIENTS": "<your SMTP_MAX_RECIPIENTS>",
        "SMTP_MAX_SENDS_PER_HOUR": "<your SMTP_MAX_SENDS_PER_HOUR>",
        "SMTP_MAX_MESSAGE_BYTES": "<your SMTP_MAX_MESSAGE_BYTES>",
        "SMTP_MAX_ATTACHMENT_BYTES": "<your SMTP_MAX_ATTACHMENT_BYTES>",
        "SMTP_ATTACHMENT_DIR": "<your SMTP_ATTACHMENT_DIR>",
        "SMTP_ATTACHMENT_TYPES": "<your SMTP_ATTACHMENT_TYPES>",
        "SMTP_SIGNATURE": "<your SMTP_SIGNATURE>",
        "SMTP_AUDIT_LOG": "<your SMTP_AUDIT_LOG>",
        "SMTP_ALLOW_TOOLS": "<your SMTP_ALLOW_TOOLS>",
        "SMTP_DENY_TOOLS": "<your SMTP_DENY_TOOLS>",
        "SMTP_INSECURE_TLS": "<your SMTP_INSECURE_TLS>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "smtp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/smtp-mcp"
      ],
      "env": {
        "SMTP_HOST": "<your SMTP_HOST>",
        "SMTP_PORT": "<your SMTP_PORT>",
        "SMTP_TLS": "<your SMTP_TLS>",
        "SMTP_USER": "<your SMTP_USER>",
        "SMTP_PASSWORD": "<your SMTP_PASSWORD>",
        "SMTP_FROM": "<your SMTP_FROM>",
        "SMTP_REPLY_TO": "<your SMTP_REPLY_TO>",
        "SMTP_ALLOW_SEND": "<your SMTP_ALLOW_SEND>",
        "SMTP_ALLOWED_RECIPIENTS": "<your SMTP_ALLOWED_RECIPIENTS>",
        "SMTP_MAX_RECIPIENTS": "<your SMTP_MAX_RECIPIENTS>",
        "SMTP_MAX_SENDS_PER_HOUR": "<your SMTP_MAX_SENDS_PER_HOUR>",
        "SMTP_MAX_MESSAGE_BYTES": "<your SMTP_MAX_MESSAGE_BYTES>",
        "SMTP_MAX_ATTACHMENT_BYTES": "<your SMTP_MAX_ATTACHMENT_BYTES>",
        "SMTP_ATTACHMENT_DIR": "<your SMTP_ATTACHMENT_DIR>",
        "SMTP_ATTACHMENT_TYPES": "<your SMTP_ATTACHMENT_TYPES>",
        "SMTP_SIGNATURE": "<your SMTP_SIGNATURE>",
        "SMTP_AUDIT_LOG": "<your SMTP_AUDIT_LOG>",
        "SMTP_ALLOW_TOOLS": "<your SMTP_ALLOW_TOOLS>",
        "SMTP_DENY_TOOLS": "<your SMTP_DENY_TOOLS>",
        "SMTP_INSECURE_TLS": "<your SMTP_INSECURE_TLS>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

Docker image

{
  "mcpServers": {
    "smtp-mcp": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/ni-c/smtp-mcp:0.2.0"
      ],
      "env": {
        "SMTP_HOST": "<your SMTP_HOST>",
        "SMTP_PORT": "<your SMTP_PORT>",
        "SMTP_TLS": "<your SMTP_TLS>",
        "SMTP_USER": "<your SMTP_USER>",
        "SMTP_PASSWORD": "<your SMTP_PASSWORD>",
        "SMTP_FROM": "<your SMTP_FROM>",
        "SMTP_REPLY_TO": "<your SMTP_REPLY_TO>",
        "SMTP_ALLOW_SEND": "<your SMTP_ALLOW_SEND>",
        "SMTP_ALLOWED_RECIPIENTS": "<your SMTP_ALLOWED_RECIPIENTS>",
        "SMTP_MAX_RECIPIENTS": "<your SMTP_MAX_RECIPIENTS>",
        "SMTP_MAX_SENDS_PER_HOUR": "<your SMTP_MAX_SENDS_PER_HOUR>",
        "SMTP_MAX_MESSAGE_BYTES": "<your SMTP_MAX_MESSAGE_BYTES>",
        "SMTP_MAX_ATTACHMENT_BYTES": "<your SMTP_MAX_ATTACHMENT_BYTES>",
        "SMTP_ATTACHMENT_DIR": "<your SMTP_ATTACHMENT_DIR>",
        "SMTP_ATTACHMENT_TYPES": "<your SMTP_ATTACHMENT_TYPES>",
        "SMTP_SIGNATURE": "<your SMTP_SIGNATURE>",
        "SMTP_AUDIT_LOG": "<your SMTP_AUDIT_LOG>",
        "SMTP_ALLOW_TOOLS": "<your SMTP_ALLOW_TOOLS>",
        "SMTP_DENY_TOOLS": "<your SMTP_DENY_TOOLS>",
        "SMTP_INSECURE_TLS": "<your SMTP_INSECURE_TLS>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

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<a href="https://mcptoplist.com/server/io.github.ni-c%2Fsmtp-mcp"><img src="https://mcptoplist.com/badge/io.github.ni-c%2Fsmtp-mcp.svg" alt="MCP Toplist: Top 10% of 132,046" /></a>

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REGISTRIES

Listed on 2 registries

Official MCP

Glama

ORGANIZATION

ni-c

Organization

ni-c

Servers in org

Versions across org

118

Other servers by ni-c

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VERSIONS

Available versions (4)

Version	Published
0.2.0	Sep 7, 2026
0.1.2	Sep 6, 2026
0.1.1	Sep 5, 2026
0.1.0	Sep 3, 2026

FAQ

Frequently asked questions

Who maintains SMTP?: SMTP is maintained by ni-c, which publishes 20 MCP servers (118 total versions) tracked on MCP Toplist.
Is SMTP listed on the Official MCP Registry?: Yes — SMTP is listed on the Official MCP Registry, alongside Glama.
How many versions does SMTP have?: MCP Toplist tracks 4 versions of SMTP, most recently published on Sep 7, 2026.
Where can I find the source code for SMTP?: The source code for SMTP is hosted at github.com/ni-c/smtp-mcp.

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