What method might an attacker use to ensure phishing emails reach their targets?

An attacker might use a DomainKeys Identified Mail (DKIM) exploit to ensure that phishing emails reach their targets by manipulating the authentication mechanisms that email systems use. DKIM is an email authentication method designed to detect spoofed sender addresses in emails. It allows the sender to associate a domain name with an email message by affixing a digital signature to it.

If an attacker can exploit DKIM, they may be able to generate fraudulent emails that appear to come from legitimate sources, thus bypassing spam filters and creating a higher likelihood that their phishing emails are seen and interacted with by the recipient. By compromising DKIM, the attacker can effectively hide the true origin of the email, making it more convincing and harder for automated systems to flag it as malicious.

In contrast, the other options do not directly relate to ensuring phishing emails reach targets. Impossible travel refers to a security principle regarding user behavior, NTP abuse focuses on time synchronization manipulation, and ARP poisoning is related to network attacks that intercept communications rather than specifically targeting email delivery.