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Spoofed messages often have mismatched message header senders (specified by the header "From") and envelope senders (specified by the envelope field "MAIL FROM"). Trend Micro Email Security provides an anti-spoofing check to detect messages with a message header sender different from the envelope sender.

Procedure

  1. On the Scanning Criteria tab, click Advanced.
  2. Select Message header sender differs from envelope sender.
    Note
    Note
    A message with a blank envelope sender does not match this criteria.