In the left hand column of your Proton go to the folder section.
Create folders to compartmentalize your correspondence.
(For example: I use Work–Financial–Shopping–Junk, but you can make as many compartments as you like)
Then go Settings (or the little gear icon) and then to Identity and Addresses. Set a unique email address for each compartment.
Then go to Filters (also in the left column) and set some simple rules for each folder. Such as all emails sent to MyFinances@pm.me forward to Finance folder.
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