Is kvbs.hairdisposable?

Yes

kvbs.hair is a disposable email service: inboxes are temporary and often open to anyone. People use these services to skip email verification or grab free trials.

Clerks at long desks in the Dead Letter Office, its name painted on the back wall — The Dead Letter Office. Mail that could not be delivered was sorted here.

Why we say this

How the data is built, and what it can’t tell you.

kvbs.hair is listed by the disposable-email-domains list.

First saw it: Nov 5, 2026
Last on a list: Nov 5, 2026

Mail servers (MX)

Checked Nov 5, 2026.

A clerk at a desk covered in stacks of envelopes — Clara Nelson of the Dead Letter Office, 1916.

No MX records found.

Block it at signup

New temp-mail domains appear constantly, so any list goes stale.

A large office of clerks at desks under hanging lamps — The Dead Letter Office, 1904.

// Node.js / TypeScript
const blocked = new Set(["kvbs.hair" /* , ...70,000+ more */]);
const domain = email.split("@").pop()!.toLowerCase();
if (blocked.has(domain)) throw new Error("Please use a permanent email address.");