Hello all, hopefully an easy question here. I just wanted to get a confirmation that enabling DMARC on the Ironport appliance is going to work the way I envision it working.
Assume you have a DMARC compliant domain and it is already in reject mode, and ISPs like Google, Microsoft, Comcast, etc. are already blocking mail based on your DMARC policy. If DMARC is then turned on at the Ironport, will it pay attention to your own DMARC settings when someone tries to send you spoofed mail that claims to be from your domain and block it? (assuming you have the ironport set to block based on DMARC evaluation) I assume that it will, however I haven't actually tried it yet. I wanted to make sure I wasn't way off base with this. Thanks.
