SPF checks can be specified using the below options. Most options can be inherited or explicitly set to yes or no.
Configuration for this module is done in the [CheckSPF] section in the configuration file.
Taking the policies described in the other feature document, we add SPF checks to all inbound email…
Check SPF on Inbound Policy: Default Inbound Policy UseSPF: Yes RejectFailedSPF: Yes AddSPFHeader: Yes