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Getting Started
Installation

Installation

Quick Install (Recommended)

Install the latest version with a single command:

bash <(curl -fsSL https://raw.githubusercontent.com/monto-fe/smtp-probe/main/install.sh)

Specify a version:

VERSION=v0.1.0 bash <(curl -fsSL https://raw.githubusercontent.com/monto-fe/smtp-probe/main/install.sh)

The script detects your OS and architecture, downloads the correct binary, and installs it to /usr/local/bin.

From Source

Requires Go 1.22 or later:

go install github.com/monto-fe/smtp-probe@latest
The check command (DNS-based) works without port 25. The verify command requires outbound port 25 access, which is commonly blocked by ISPs and cloud providers.

Verify Installation 

smtp-probe --version

Next Steps

Quickstart