MarkRTD Seller Tools

Free Email Checker

Paste any sender address and check it free: official company domain or lookalike, domain age, mail server, SPF and DMARC.

A Free Email Checker, No Signup

Paste the sender’s email address above. The checker compares its domain with the official domains of marketplaces, couriers, payment apps and government portals, and flags lookalikes such as flip-kart.com or amaz0n.in. It also says when an “official” email comes from a Gmail or Yahoo address.

Then it reads the domain’s public records live: whether it exists, when it was registered, whether it has a mail server, and its SPF and DMARC protection. There is no signup, no limit, and only the domain is looked up, not your inbox.

Frequently asked questions

Is this email checker really free?

Yes, with no signup or daily limit.

Does it read my emails?

No. You paste one address, and only its domain is looked up in public records.

Does it check if a mailbox exists?

No. It checks the domain, not whether a particular inbox is active.