New Release: DMARC Monitor Desktop App for Postmark

We’re excited to announce the launch of our new open-source software project: DMARC Monitor – a Windows desktop application designed to help administrators and IT professionals easily monitor and manage DMARC New Release: DMARC Monitor Desktop App for Postmark

Built with .NET 8 and WPF, DMARC Monitor offers a clean, modern interface and is packed with features that simplify domain validation, track DMARC health, and ensure secure and consistent email practices.

What is DMARC Monitor?

DMARC Monitor is a desktop console for domain monitoring that connects directly to the Postmark DMARC API. It provides visual indicators, real-time validation, and secure management of DMARC records across multiple domains. If you’re tired of manually inspecting DNS records or chasing down report forwarding issues, this app is for you.

Key Features

Visual Status Dashboard
Color-coded domain health grid (Green = Valid, Yellow = Warning, Red = Error).
Domain Management Made Easy
Add and remove domains with validation and intuitive dialogs.
DMARC Record Validation
Automatically checks and parses DNS records for DMARC compliance.
RUA Address Verification
Confirms proper report forwarding setup to Postmark.
Postmark API Integration
Instantly verify domain status via Postmark’s DMARC monitoring service.
Secure Storage
API keys are encrypted with Windows DPAPI – no plaintext secrets.
Robust Logging & Troubleshooting
File-based logs with daily rotation and multiple verbosity levels.
Fully Asynchronous UI
Responsive interface with non-blocking operations for smooth user experience.

Getting Started

Requirements:

Windows OS
.NET 8.0 SDK
Postmark DMARC API token (free to obtain)
Internet connection

Setup Steps:

Build with dotnet build and run with dotnet run
Enter your Postmark API key and default RUA address in the Settings panel
Add the domains you want to monitor
Click “Refresh All” to fetch DMARC status and see instant results

All configuration and logs are stored in %APPDATA%\DmarcMonitor\, so it’s easy to back up or move between systems.

Download

You can download the latest release of DMARC Monitor here:

Download DMARC Monitor – Windows Installer (v1.0)

Includes:

Standalone Windows executable
Auto-generated configuration path under %APPDATA%
No installer required (portable version also available)

Security at Its Core

DMARC Monitor is built with strong security principles:

Encrypted API key storage using Windows Data Protection API
HTTPS for all API communications
No sensitive data stored unencrypted

Roadmap

Planned enhancements include:

Scheduled automatic domain checking
Email and Microsoft Teams alerts
SQLite support for advanced data handling
Cross-platform version via .NET MAUI

Who Should Use This?

This tool is ideal for:

IT administrators managing multiple domains
Email deliverability experts
MSPs offering DNS/email health audits
Anyone using Postmark’s DMARC monitoring platform

Preview

Open Source & Ready for Contribution

DMARC Monitor is fully open source under the MIT License.
You can explore the project on GitHub (replace with your repo link), fork it, suggest features, or report bugs.

If you’d like to contribute, feel free to open a pull request or raise an issue — your feedback and involvement are always welcome.

Need Help?

If you run into issues:

Review the troubleshooting section in the README
Check the logs at %APPDATA%\DmarcMonitor\
Or contact the developer

About the Developer

Ant Axolotl
Founder @ lotlWorks
Email: ant@lotlworks.org