Using Message Header Sender Differs from Envelope Sender Criteria

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.

  1. On the Scanning Criteria tab, click Advanced.
  2. Select Message header sender differs from envelope sender.

    A message with a blank envelope sender does not match this criteria.