Unibox for Bulk email accounts?

I have 1k+ email accounts and need to monitor inboxes.

Any tool (pref web based) to view all in a unibox?

No outreach. Just import csv of accts

There is an easy way to link via Hubspot or link your sender with any email panel; there are so many around, but sadly, they are all paid but one time like sendy , mailwizz , mumara ETC.,

Good luck