Use this page to validate Proton Mail email addresses, review domain and DNS health, and quickly spot low-quality or temporary inbox patterns.
Useful for privacy-focused inboxes and alias-style addressing. Use this page to review whether addresses on these domains look technically consistent before signups, imports, or outbound campaigns.
Many providers use more than one active domain, legacy alias, or regional address pattern. That means an email can still belong to the same provider family even when the visible domain is not the most obvious one.
This page helps you compare the submitted address against the common domains listed above, then verify whether DNS and mail-routing signals still look healthy for that address family.
Enter the full email address, start the check, and review syntax, domain, DNS, and disposable-domain signals in the result page. This works for common Proton Mail domains such as proton.me, protonmail.com, pm.me.
No. Validation improves data quality and helps identify obvious risks, but it cannot guarantee mailbox existence or delivery in every case.
Yes. This page is designed for pre-checking addresses used in signup forms, imports, and outbound campaign preparation.
Some providers operate more than one active domain, including legacy aliases, regional variants, or newer replacement domains. Listing them together makes it easier to validate addresses from the same provider family.
Useful for Google Workspace and consumer Gmail addresses.
Useful for Microsoft 365 and legacy Hotmail-style addresses.
Useful for long-standing consumer Yahoo inboxes.
Useful for Apple ecosystem inboxes and legacy Apple aliases.
Useful for DACH-region consumer addresses across GMX domains.
Useful for German-language consumer inboxes.