Yopmail

What it is

Yopmail is a French-origin disposable email service popular in Europe. No registration required; every local-part @yopmail.com is implicitly available. The inbox is public — anyone who guesses the local-part can read it.

Why signup forms see so many of these

Yopmail's public-inbox model is identical to Mailinator. Strong adoption in European traffic means English-only blocklists often miss its many regional alias domains (cool.fr.nf, jetable.fr.nf, etc.).

Known alias domains

Naive blocklists that only block yopmail.com miss every alias below. These are all routed through the same provider.

• yopmail.com
• yopmail.net
• yopmail.fr
• cool.fr.nf
• jetable.fr.nf
• nospam.ze.tc

The actual production list of Yopmail-operated domains is larger. CheckDisposable Email tracks all of them, updated daily.

Block Yopmail the right way

Send the signup email to GET https://api.checkdisposable.email/v1/check?email=<email> with a Bearer API key. If is_disposable is true, reject the signup.

// node — block Yopmail + all aliases in one call
const r = await fetch(
  `https://api.checkdisposable.email/v1/check?email=${encodeURIComponent(email)}`,
  { headers: { Authorization: `Bearer ${process.env.CDE_KEY}` } }
);
const { is_disposable } = await r.json();
if (is_disposable) {
  return res.status(400).json({ error: 'Please use a real email address.' });
}
// continue with signup

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