Javascript to quickly delete all defined spam filers in protonmail settings in the web environment.

protonmail-delete-spam-filter-domains.js

const getDomainKeys = () => Object.entries(Array.from(document.querySelectorAll('#spam tbody tr[role="row"]'))).flatMap(el => {
    Object.entries(el[1]).find(v => v[0].startsWith('__reactFiber$'))[1].return.key);
};

const deleteDomainsByKeys = async (ids) => {
    await fetch("https://account.proton.me/api/mail/v4/incomingdefaults/delete", {
        "credentials": "include",
        "headers": {
            "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:138.0) Gecko/20100101 Firefox/138.0",
            "Accept": "application/vnd.protonmail.v1+json",
            "Accept-Language": "nl,en-US;q=0.7,en;q=0.3",
            "x-pm-appversion": "[email protected]",
            "x-pm-uid": "66n6fltrslgbw465u2tbhzklu3aoxajb",
            "content-type": "application/json",
            "Sec-Fetch-Dest": "empty",
            "Sec-Fetch-Mode": "cors",
            "Sec-Fetch-Site": "same-origin",
            "Sec-GPC": "1",
            "Priority": "u=0"
        },
        "referrer": "https://account.proton.me/u/2/mail/filters",
        "body": JSON.stringify({
            IDs: ids
        }),
        "method": "PUT",
        "mode": "cors"
    })
};

// Usage:
//
// deleteDomainsByKeys(getDomainKeys()); document.querySelector('#spam button[title="Next"]').click()
//
// After doing this a number of times, you may have to reset the pager to page 1 and start again. 
// Repeat until all pages have been deleted.