Configuring security controls for your business domain such as SPF, DKIM, and DMARC can help you prevent attackers from impersonating your organization’s email addresses.
Email is an important asset for any organization – for communicating with customers, reaching new clients, and liaising with vendors. However, if your organization’s email is not secure an attacker can impersonate you in order to trick people into giving them information, access, or money.
Tip: It’s important to implement security policies for domains that don’t use email as well. Even if you know you don’t send emails from that domain, other email providers may not realize this, and so attackers can still send emails that seem to come from your domain.