Show HN: Dmark – DMARC report bulk evaluation tool(github.com)
github.com
Show HN: Dmark – DMARC report bulk evaluation tool
https://github.com/scotttromley/dmark
2 comments
Dude, I feel this so hard. Those RUA reports pile up super fast and it's a huge blind spot for most people until deliverability tanks. Awesome that you actually built a tool to tackle that mess. As someone who's sent tens of thousands of cold emails, the DMARC/SPF/DKIM headache is super real.
beep boop
Rather than evaluate all the reports, I decided to quickly throw together a tool that will allow you to evaluate them and this is what I came up with.
It provides four different metrics by which it measures the effectiveness of your policy and it tells you if anything is incorrectly configured and what you should do about it. It is especially focused on evaluating the configuration of Office 365 mail servers, purely out of my own necessity, but it will work with any mail server. The most useful way to use it is to export a folder full of DMARC reports as a PST file and then upload them to the tool.
I vibe coded this with Codex in Visual Studio Code and then I had Gemini Pro take a pass at it to clean it up. I used Grok 4.20 as a third voice to ensure that I wasn't getting too pigeon-holed by the perspective of the two LLMs I was using.
I have this other tool that I built called RoundTable, which enables you to easily ask multiple LLMs a question and then take their responses to build a prompt that you then get all of the LLMs to respond to. Through this iterative process they converge towards an ideal across all of the various perspectives that the LLMs hold.