AI-written phishing emails no longer have the broken grammar that used to give them away. The tells have shifted from language quality to behavioral patterns: urgency framing, mismatched sender domains, and requests that skip your organization’s normal approval chain.
What actually still works as a signal
Header analysis, sender reputation, and link destination checks remain effective because they don’t depend on how well the email is written. Pair those automated checks with a short reporting habit for your team and you catch most of what slips past a spam filter.