Most email security is built around the premise - is this message safe to let into the organization's perimeter?” But today’s account takeover attacks are creating harder problems. For instance, what happens when the attacker is not sending from a suspicious domain, spoofing an executive, or attaching obvious malware? Or what happens when the attacker is already inside a legitimate email account?
Threat intelligence often has a slightly glamorous (and serious) association with spying and national security activities. In email security, however, it’s slightly unglamorous; mostly involving the use of threat data, behavioral signals, sender context, domain reputation, message patterns, and recipient activity to judge whether an email is safe, suspicious, or dangerous.
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