To make sure this doesn't happen again, you'll need to update the mail flow rule. Go to the Rules page. Click on the rule ...

To make sure this doesn't happen again, you'll need to update the mail flow rule.
  1. Go to the Rules page.
  2. Click on the rule that rejected the message, and do one of the following:
  • Click Edit to customize the rule's conditions so it will no longer delete this type of message.
  • Click Delete to remove the rule entirely.