One common sign of spoofed messages is mismatched message header sender (specified
                  by
                  the header "From") and header Reply-To. Trend Micro Email
                     Security can detect messages with the header sender different from header Reply-To to
                  protect you against spoofing.
Procedure
- On the Scanning Criteria tab, click Advanced.
 - Select Message header sender differs from header Reply-To.
 
		