Spoofing can mislead your subscribers into thinking they are receiving legitimate emails from your brand when, in reality, they are from malicious actors. This can lead to the unintended spread of malware, phishing attacks, and a general loss of trust in your brand. To combat spoofing, implement SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting & Conformance).