Email hygiene

Email hygiene checks whether a submitted address is real and reachable: it validates syntax, confirms the domain receives email, detects known disposable providers, and applies your own blocked domains. An address can look valid and still be useless.

A domain can receive SMTP mail through explicit MX records or, when no MX is published, through the implicit-MX fallback to a resolvable A or AAAA host. A Null MX record explicitly declares that the domain accepts no email.

Choose flag or block

Flag keeps the submission but adds the result to its spam score. This is safer when every lead matters.

Block rejects the submission before it reaches the inbox. Use it when invalid or disposable addresses have no value to your workflow.

Temporary DNS failures fail open. A provider outage should not make a valid person lose their message.

Email hygiene improves the quality of submitted addresses. It does not prove that the person owns the mailbox.