Sender IP Match

Trend Micro Email Security allows you to specify an IP address or a range of addresses within a sender domain identified by themessage header address to allow email messages only from those addresses. Sender IP Match is a way that readily enables you to simultaneously allow all inbound email traffic from a particular domain while equally preventing spoofing by manually defining the allowed IP ranges.

If an email message passes the Sender IP Match check, Trend Micro Email Security skips its own SPF check as well as the SPF check of DMARC authentication for this message.