Email Check

Validates the address format and shows the mail servers and SPF policy for its domain.

Does "valid format" mean the mailbox exists?

No. Format validation only confirms the syntax. Existence requires connecting to the receiving server — many now block such probe connections, which is why we don't fake it.

What is SPF?

SPF lists which servers are allowed to send email for a domain. Missing or broken SPF is the top reason email lands in spam.