v2.3.3

Microsoft Graph & SMTP Testing Tools

Portable CLI tools for comprehensive email infrastructure testing - both cloud (Exchange Online via Microsoft Graph) and on-premises (SMTP servers).

What's Included

Each ZIP archive contains:

• msgraphgolangtestingtool - Microsoft Graph API tool for Exchange Online
• smtptool - SMTP connectivity testing tool with comprehensive TLS diagnostics
• README.md - Main documentation
• SMTP_TOOL_README.md - Complete SMTP tool guide
• BUILD.md - Build instructions for both tools
• EXAMPLES.md - Microsoft Graph tool usage examples
• LICENSE - MIT License

Installation

Windows:

1. Download msgraphgolangtestingtool-windows.zip
2. Extract the ZIP file
3. Run msgraphgolangtestingtool.exe or smtptool.exe directly

Linux:

1. Download msgraphgolangtestingtool-linux.zip
2. Extract: unzip msgraphgolangtestingtool-linux.zip
3. Make executable: chmod +x msgraphgolangtestingtool smtptool
4. Run: ./msgraphgolangtestingtool or ./smtptool

macOS:

1. Download msgraphgolangtestingtool-macos.zip
2. Extract: unzip msgraphgolangtestingtool-macos.zip
3. Make executable: chmod +x msgraphgolangtestingtool smtptool
4. Run: ./msgraphgolangtestingtool or ./smtptool

Note for macOS: If you see "cannot be opened because the developer cannot be verified":

• Right-click the binary and select "Open", or
• Run: xattr -d com.apple.quarantine msgraphgolangtestingtool smtptool

Quick Start

Microsoft Graph Tool:

# Windows
.\msgraphgolangtestingtool.exe -tenantid "..." -clientid "..." -secret "..." -mailbox "user@example.com" -action getinbox

# Linux/macOS
./msgraphgolangtestingtool -tenantid "..." -clientid "..." -secret "..." -mailbox "user@example.com" -action getinbox

SMTP Tool:

# Windows - Test connectivity
.\smtptool.exe -action testconnect -host smtp.example.com -port 25

# Windows - Comprehensive TLS diagnostics
.\smtptool.exe -action teststarttls -host smtp.example.com -port 587

# Linux/macOS - Test connectivity
./smtptool -action testconnect -host smtp.example.com -port 25

# Linux/macOS - Comprehensive TLS diagnostics
./smtptool -action teststarttls -host smtp.example.com -port 587

Documentation

• README.md - Overview and quick start for both tools
• SMTP_TOOL_README.md - Complete SMTP tool documentation with all actions
• EXAMPLES.md - Detailed Microsoft Graph tool examples
• BUILD.md - Build from source instructions
• Online: GitHub Repository

Tools Overview

msgraphgolangtestingtool - Microsoft Graph API operations:

• Send emails, create calendar events
• List inbox messages and calendar events
• Check availability, export data
• Multiple authentication methods (Client Secret, PFX Certificate, Windows Certificate Store)

smtptool - SMTP connectivity testing:

• Test basic SMTP connectivity with capability detection
• Comprehensive TLS/SSL handshake analysis
• Certificate chain validation and expiry warnings
• SMTP authentication testing
• Send test emails
• Exchange server detection (2003-2019)