Free API to check if email is temp or disposable

[chrisjj]

This failed on the first disposable email address I tried. A Fastmail masked email address.

> I wanted something simple, fast, and free

You got that. Just not accurate.

> I built this because I kept seeing disposable emails quietly ruin signups, waitlists, and metrics

I do wonder why you think disposable email addresses ruin signups. Esp. given they are often used to avoid signups ruining inboxes with spam.

[tntpreneur]

> I'll add more resources to find disposable domains and validation points. You can report the domain here so I can add it to the list: https://disposablecheck.irensaltali.com/report.

> As the product owner, if I didn't need real email addresses, I would just use usernames. If there is an email, then a legitimate email address is required. Spam is a different problem.

[tntpreneur]

I built this because I kept seeing disposable emails quietly ruin signups, waitlists, and metrics — especially on small projects where every user matters. Most solutions felt heavy, paid, or overkill, so I wanted something simple, fast, and free that developers could drop in instantly.

[pmontra]

A throw away mail is a way to anonymously test a service. Maybe you want only people that commit their real identity to evaluating your service, but maybe you will lose some conversion after an anonymous evaluation. You'll also have less word of mouth.