I concur, and it's a shame they have chosen to make a bunch of noise and pass the blame rather than see if they have an issue. Even Gmail's own interface ("sho

I concur, and it's a shame they have chosen to make a bunch of noise and pass the blame rather than see if they have an issue. Even Gmail's own interface ("show original " I think) will display a failure of the DMARC check and is a useful testing tool. Sadly noise like this adds a misleading boost to the "it's impossible to run your own email server" sentiment, but I don't believe this is as true as people make out (yet). I started this post to say thanks for sharing the mail-tester.com website. I just tested my own setup and found it thoroughly useful.