There are three main policies you can set in your DMARC record:
None: The "none" policy is used for monitoring purposes. It does not affect email delivery but allows you to receive reports. Quarantine: The "quarantine" policy directs receiving servers to treat emails that fail DMARC checks as suspicious. These emails are typically sent to the spam or junk folder. Reject: The "reject" policy instructs receiving servers to reject emails that fail DMARC checks. This is the strictest policy and offers the highest level of protection.