From the fine article he linked: *SPF, DKIM and DMARC are all domain verificatio... | Hacker News

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		j_s on March 25, 2017 \| parent \| context \| favorite \| on: Google Talk Is Being Discontinued From the fine article he linked: SPF, DKIM and DMARC are all domain verification systems for validating e-mail’s origin to prevent spam. I have all three records set in DNS records for all the domains I send e-mail from, verified they were correct using testing tools, and I still get flagged as spam.

codezero on March 25, 2017 [–]

Google uses a lot of signals. The article above is on http, I saw a drop in spam flagging when the web host on my email domain was https only.

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