Emails from Google Workspace accounts may be dropping, particularly to banks, due to a complex interplay of factors. These include technical issues like incorrect MX record setup, SPF/DKIM misconfiguration, and strict DMARC policies. Sender reputation plays a vital role, with low reputation, being on blacklists, or using new domains triggering spam filters. Content can also cause issues, with specific keywords or poor design triggering filters, particularly in the highly sensitive financial sector. Google Workspace's rate limiting and sending limits for new accounts can also contribute. Monitoring feedback loops and sender reputation is essential. In some cases, direct communication with bank IT security or even using a Gmail account might be more practical.