Email Insight - Enhancing "Other" option

Hello Team, This idea came from a customer who wanted to filter out the "Others" found in email insight. Per the customer, she is seeing triple the volume in others than the categorized options. Idea here is that to add "Web mails" as an option in the drop down to further drill the insight. That being said, adding more categorized drop downs will improve the vision for developers to create a fully functional email. Please suggest the possibilities. Thanks, Karthik Lead - Marketo Support