Switch to Protonmail Reason #29: Get phishing warnings before trusting an impersonated sender

Why this matters

A fake invoice or reset notice can take credentials in minutes. A mailbox should help expose deception. Privacy is easier to defend before this information is collected than after it has spread.

The protection

Proton's security checklist describes phishing defenses, including PhishGuard and sender-authentication checks.

Take action

Treat warnings as a stop sign and verify requests through a separate channel. Filters cannot catch every new attack. Email protection depends on the route and settings. Ordinary mail involving outside providers is not automatically end-to-end encrypted, and email metadata is not universally hidden.

Sources

Proton Mail security checklist.