Problem
You are not sure why unknown rules affect certain emails to contain expressions, are modified, headers do not contain the proper information, or actions are taking place on them.
Environment
- Gmail
Solution
- Sign in to the Admin console.
- Click Apps > Google Workspace > Gmail.
- Move to the Routing section.
- Verify the rules list.
- Click on Disable or Delete on the ones you no longer need active.
Cause
Emails being forwarded, modified or changed from envelope recipients.