Description

Detects inbound messages sent to Outlook group distribution lists (groups.outlook.com) where the body text is classified with high confidence as callback scam intent by an NLU model, while excluding cases where recipient lists are empty or entirely invalid.

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Sublime Security
Created Aug 27th, 2026 • Last updated Sep 4th, 2026
Source
type.inbound
and all(recipients.to, .email.domain.domain == "groups.outlook.com")
and any(ml.nlu_classifier(body.current_thread.text).intents,
        .name == "callback_scam" and .confidence != "low"
)
and not (
  length(recipients.to) == 0 or all(recipients.to, .email.domain.valid == false)
)
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