DMARC support with SMG

We are currently running SMG 10.5.2-3 with intention to move to 10.5.3-4.  I have seen there is some support for DMARC with Symantec products -but I haven't seen where support for this is available with the current versions of SMG. 

Can anyone shed some additional light on DMARC support through SMG  and if you have any experience using DMARC please let me know your experiences with it.

Thanks