Show HN: A free tool to monitor and implement DMARC

We used this and discovered that our "authenticated" Mailchimp campaigns were actually failing to be validated properly, and some email systems (especially corporate systems with spam filtering appliances like Barracuda) were not delivering our email. DMARC didn't help tell us that our mail wasn't being delivered, per se, but once we made a change (our own spf/dkim records, along with other DNS-related changes) and stopped using Mailchimp's authentication, our following campaigns have seen a higher deliver rate (evidenced by more opens, clicks, and OOF responses for campaigns that aren't fundamentally different).

I'd also recommend, in addition to Postmark's tool (not in place of), checking out https://dmarcian.com. You can use both at once for DMARC aggregate reports, and additionally forward the forensic DMARC reports to dmarcian for analysis.

It's been said before, but email deliverability is hard. Thank goodness tools like this are around to help us mere mortals understand more of it, and protect the repute to of our domains in the process.

Hi all! I’m Jack and I work on the Postmark team at Wildbit. This is a free tool from Postmark to help you monitor and implement DMARC for your domain. DMARC is a standard that prevents hackers and spammers from using your domain to send spam without your permission. The tool helps you do this by processing reports from major ISPs about your domain’s DMARC alignment and turns them into beautiful, human-readable weekly email digests, absolutely free. If you have any questions about this tool, I and one or two other members of the Postmark team will be around to answer your questions.

I should also add that the folks at Postmark who created this great tool were Chris Nagele, Artem Chistyakov, and Derek Rushforth.