This would be hugely beneficial for taking stock of what email clients our contacts are using, so that when designing emails, we can prioritize those email clients. As we all know, emails can render very differently between Outlook, Gmail, Thunderbird, etc. and that’s why there’s the feature to test emails on different platforms already built into Hubspot. Hubspot gives you the ability to test on 90 different clients/devices. So obviously it’s not feasible to spend the time and resources to get it looking perfect on all the potential combinations of clients and devices out there. We need the ability to know what email clients and devices our contacts are using to view our emails, so we can prioritize those when we’re designing emails. Details matter, and emails that don’t look or function well when someone opens it are not likely to perform as well. This reporting exists, in one form or another, on other email platforms already.