Recently, all of our company emails are ending in spam. We are following all of Google's good practices SPF set correctly, DKIM, DMARC. We only send transactional email to engaged users and with a visible unsubscribe link. We serve millions of customers and one week the amount of customer support tickets increased significantly because they aren't receiving emails such as forgot password, payment receipts, etc.

Google is flagging all of our email as spam, including when we answer support requests and send email directly from gmail's interface.

Please YC, any recommendations on what to do? I'll probably spend nye working.

Thank you :)