Proton's spam filter, block list and folder rules work much like anyone else's — and if you have Proton Pass, the hide-my-email aliases bundled with it are the part that actually changes your situation. Worth being clear about one thing: Proton's encryption is excellent and has nothing to do with spam. Encryption protects message contents. Spam is about who has your address, which is a separate problem with a separate fix.
The distinction that matters here
People move to Proton for privacy and are then surprised the spam follows them. It follows because moving providers doesn't change who holds your address — the same several hundred organisations still have it, and the new one is just a different destination.
Encryption answers "who can read this message". Spam answers "who can reach me". Different questions, different tools. The full distinction
What to configure
1. Mark as spam, don't delete
Move unwanted mail to Spam so the filter learns. Check the folder occasionally for legitimate mail — Proton's filter is decent but no filter is exempt from failing in both directions.
2. Block senders
Settings → Filters → Spam, block and allow list. Add specific addresses, or better, add domains — bulk senders rotate the local part constantly.
3. Build folder rules
Settings → Filters → Add filter. Match on sender, domain or subject and move to a folder or bin. Rules are exact and, unlike the classifier, never change their mind — the right tool for senders you've already judged.
4. Block remote images
Settings → Messages and composing → remote content: ask before loading. Proton blocks remote content by default in most configurations, which stops open-tracking pixels reporting back. How tracking works
5. Unsubscribe from senders you recognise
Proton surfaces an unsubscribe control for mail carrying the standard header. Use it for companies you recognise; never for senders you've never dealt with. Why the distinction matters
The part that actually changes things: aliases
Proton Pass includes hide-my-email aliases — 10 on the free tier, unlimited on Pass Plus, with custom domain support and send-from-alias on paid plans. Source: proton.me/pass/pricing. Checked: 2026-08-19.
This is the item on the list that alters your trajectory rather than sorting your inbox, because it changes what you hand out. If you're already paying for Proton, you likely have this and may not be using it.
Set it up so every new signup gets its own alias, and the number of organisations holding your real Proton address stops growing. How Proton Pass compares · The routine
Custom domains
Proton supports using your own domain for both mail and aliases on paid plans. Worth doing if you expect to depend on the addresses long-term: aliases on a domain you own survive you changing provider, whereas @proton.me or @passmail.net addresses don't. The trade-off
Filtering, blocking and rules all act on mail after it arrives. They keep the inbox tidy while the number of parties holding your address keeps rising. Only the alias half changes that — which is true on Proton exactly as it is on Gmail. Why
Proton's own support pages are authoritative on interface details. More: the Gmail equivalent · the full guide