If your email is sending random or gibberish text, here are a few steps to follow to troubleshoot the issue:

1. Check the filters in your email set up
2. Empty the Trash folder, as there may be a group of messages that are causing the issue
3. Turn off Out-of-Office or Vacation auto-reply settings
4. Disable signatures or third party external applications like CRM, accounting, or marketing which may be connected to your email
5. If the issue persists, try logging out and rebooting your computer before you log back in