zerosmtp for Gemini CLI

io.github.msgwing/zerosmtp

A free SMTP relay that still takes a username and password, for devices that cannot do OAuth 2.0.

client:Gemini CLI transport:stdio runtime:npm

Install zerosmtp in Gemini CLI

~/.gemini/settings.json · windows: %USERPROFILE%\.gemini\settings.json

{
  "mcpServers": {
    "zerosmtp": {
      "command": "npx",
      "args": [
        "-y",
        "zerosmtp-mcp"
      ]
    }
  }
}

Gemini expands $VAR and ${VAR} inside env values, so a secret can live in your shell rather than this file. Gemini CLI docs