HTML rendering problems with emailed dashboards

I’m having issues when viewing emailed dashboards in Outlook 2016’s desktop client. The dashboards look fine in a webmail client. I understand they use different rendering engines but was curious if anyone experienced similar problems and have any workarounds for the desktop client? We are currently using RT 4.0.4. Would upgrading the RT version help with this at all?

In the desktop client, the dashboard table is not formatted correctly and the content of the email has the solid RT background color automatically filled.