Install SMTP for Claude Desktop
Claude Desktop reads mcpServers from claude_desktop_config.json. Restart the app after saving.
- Open ~/Library/Application Support/Claude/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.json on Windows, or ~/.config/Claude/claude_desktop_config.json on Linux.
- Paste the JSON config below.
- Replace placeholder secrets, then restart the client if it does not reload on its own.
~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"ni-c-smtp-mcp": {
"command": "npx",
"args": [
"-y",
"@ni-c/smtp-mcp@0.2.0"
],
"env": {
"SMTP_HOST": "",
"SMTP_PORT": "",
"SMTP_TLS": "",
"SMTP_USER": "",
"SMTP_PASSWORD": "YOUR_SMTP_PASSWORD",
"SMTP_FROM": "",
"SMTP_REPLY_TO": "",
"SMTP_ALLOW_SEND": "",
"SMTP_ALLOWED_RECIPIENTS": "",
"SMTP_MAX_RECIPIENTS": "",
"SMTP_MAX_SENDS_PER_HOUR": "",
"SMTP_MAX_MESSAGE_BYTES": "",
"SMTP_MAX_ATTACHMENT_BYTES": "",
"SMTP_ATTACHMENT_DIR": "",
"SMTP_ATTACHMENT_TYPES": "",
"SMTP_SIGNATURE": "",
"SMTP_AUDIT_LOG": "",
"SMTP_ALLOW_TOOLS": "",
"SMTP_DENY_TOOLS": "",
"SMTP_INSECURE_TLS": ""
}
}
}
}