Unusual signals are the behavior or traits of an email that look suspicious to Trend Micro Email
Security. A single unusual signal does not mean
a definite threat but can indicate possible risks. When detecting one unusual signal
in an email message, Trend Micro Email
Security supports taking
action on the message. For details about unusual signals, see Unusual signals.
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NoteTrend Micro recommends that you use the "Do not intercept messages" and "Insert
stamp in body" actions for unusual signal detection. A default stamp "Unusual
signal detection" is available for use.
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Procedure
- Select Unusual signal.