We’re having the opposite problem. Our confirmation emails are getting marked as spam, despite them very much not being spam, nor having their content change over the last few years.
This happens with our indie conference [0] every year! It's so frustrating! Our domain passes all DKIM and SPF record checks. If you inspect the email headers it's all valid.
Our stuff gets sent to Gmail spam and the business suffers for it.
Our stuff gets sent to Gmail spam and the business suffers for it.
[0] https://handmade-seattle.com