Google has started automatically blocking emails sent by bulk senders who don’t meet stricter spam thresholds and authenticate their messages as required by new guidelines to strengthen defenses against spam and phishing attacks.
As announced in October, the company now requires those who want to dispatch over 5,000 messages daily to Gmail accounts to set up SPF/DKIM and DMARC email authentication for their domains.
It’s a slow rollout to give legitimate businesses time to get their settings in order. And believe me, there are a lot of them that still haven’t.
In my experience, organizations don’t change things until after it stops working and not a minute sooner. :(
You don’t need to tell me lol, there have been dozens of companies still asking us to whitelist their shit and everything time, “We don’t do that here.”