We have plenty of places in HubSpot a specific email address is used within workflows and automated emails (i.e., used as reply-to's and forwards) but finding those email addresses is very tedious, as we have to open each workflow and atuomated email individually to manually dig to find where they're being used.
A function that would allow you to search your entire HubSpot account for email addresses being used and where they're used would be an excellent feature.