What are the two methods that can be used to bypass spam scanning?

The assertion that creating a new Spam Scanning Policy with the action "Tag Headers" allows bypassing spam scanning is not correct. In fact, this action is designed to mark emails as spam by adding specific tags to their headers, which typically helps enhance their identification as potentially undesirable rather than bypassing any scanning process.

The correct methods to bypass spam scanning involve additions to designated sender groups. Specifically, adding an entry in the Permitted Sender Group would allow emails from those senders to be ignored by spam filtering. The same applies to adding an entry in the Managed Senders, where emails from those senders are considered trusted and hence would not undergo spam scanning, ensuring their delivery without being subjected to scrutiny associated with spam filtering mechanisms.

It’s important to ensure that trusted and legitimate senders are marked appropriately within these groups to prevent legitimate messages from being incorrectly classified as spam, thus maintaining efficient email delivery.