DKIM Verification Requirement on Email Server
One important requirement for this feature that I don't think was ever explicitly stated by Gainsight is that your org must use DKIM verification on their email servers. Our org uses SPF verification, so even though I signed up for the beta of this feature, it is not able to be properly implemented. This is disheartening for my entire team as I excitingly told them about our participation in this beta, only to come back and disappoint them. I hope that the products team is looking into solving this because I can imagine that my organization is not the only one who's email servers are configured as such.