xnnd
Did you know? For the past fifteen years, I’ve run a simple little website at xnnd.com that provides a set of DNS lookup tools. My goal was to have a simple set of tools to help you troubleshoot DNS issues. You can do things like look up DMARC settings for a domain, try to find the DKIM selector(s) in use for a domain, check a domain’s BIMI record, query the same IP or domain against a bunch of different public DNS servers all at once (helpful to catch intermittent or propagation-related issues), and a few other things. This past weekend I moved XNND from Amazon’s AWS to Google Cloud (partly to save some money, and partly to see if I could do it), and so far it seems to have moved over just fine — but if you see anything amiss, please feel free to let me know!
Looking for guidance on how to create your BIMI logo file? Valimail has a pretty good guide that explains the requirements and they also explain what to keep in mind when creating your BIMI graphic SVG file. Starting with:SquareSVG Tiny Portable/Secure formatSolid backgroundPublished via HTTPSSVG meaning a Scalable Vector Graphics file, and particular type of SVG called SVG Tiny Portable/Secure (SVG P/S). The image has to truly be a vector graphic; the overall SVG spec does allow you to embed a bitmap in a file but this isn’t allowed for SVG P/S or BIMI usage.The Valimail guide goes on to explain how to manually edit the SVG file to convert it to the SVG P/S spec. But if you don’t feel like editing XML files by hand, download this converter application that the BIMI (AuthIndicators) Working Group has shared here. I’ve used the Macintosh version and it works fine. (You…
I’ve got just enough time for a quick post today, to share with you this very useful DMARC Dictionary put together by the fine folks at dmarcian. Check it out! And since that would make for a very short blog post, here’s four bonus online resources that you might also want to bookmark, if you didn’t already know about them:The ISP Information page from Laura Atkins and Steve Atkins over at Word to the Wise, where they’ve collected info on which ISPs offer ISP Feedback Loops (FBLs), which ones have Postmaster information pages, help/support ticketing systems, etc.My new friends at Kickbox (disclaimer: they are my employer) have put together this great “Developer’s Guide to Email” website that you are going to find quite useful if you are looking to learn more about email technology or study how it all comes together.Postmark’s SMTP Field Manual allows you to look up example bounce messages…