Verify a Proton email address
Free, instant check for proton.me, protonmail.com, pm.me addresses — syntax, DNS, typo and risk analysis from a real delivery engine.
What to know about validating Proton addresses
- proton.me is the current primary domain; protonmail.com and pm.me still work for existing accounts.
- Proton's servers deliberately reveal nothing about mailbox existence to protect their users — the strongest possible case for heuristic validation.
- Privacy-focused audiences skew toward Proton; a list with many Proton addresses is normal, not suspicious.