How to Identify and Block Disposable Email Domains

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Find answers to common questions about email verification.

What is a disposable email?

A temporary email address used for short-term signups (e.g., mailinator.com).

Why block disposable emails?

They lower email deliverability, harm engagement, and fill your list with fake users.

How can I detect them?

Use an email validation tool or API that flags known disposable domains in real time.

How to block them on my site?

Add domain blacklists or integrate a validation API into your signup form.

Do disposable emails hurt my sender reputation?

Yes, they increase bounces and spam risk, reducing inbox placement.

How often should I update the list?

Regularly, new disposable domains appear daily.

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