Especially with the connection to Gmail, and especially with the already existing ability of up to 10+ alternative emails leading to the same inbox, we need the ability near the top of proton mail to "Filter by Address", with checkboxes for each of your email.

For example, if I have 3 Proton Emails, and my Gmail Account (PersonalProton1@pm.me, BusinessProton2@pm.me, MiscProton3@pm.me, Gmail@gmail.com), but I only want to see the emails for my business email (BusinessProton2@pm.me), I need to simply have a checkbox to only include inbox messages coming to that specific address (BusinessProton2@pm.me).

Now, this is theoretically possible by going into filters, than more filter settings, then adding a specific recepitant address, but this is not only extremely time consuming just to filter these emails, but extremely unconventional.

You should make it to where it's a quick checkbox mark of your listed emails. It's fast, easy, and EXTREMELY useful.

This will be especially helpful with the new Gmail linking(s).