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Deliverability Letter

Disposable Email

Also known as: Burner email, throwaway address

A disposable email is a temporary address created for a single use, often to sign up for a service without revealing a real address.

Disposable email addresses (DEAs) are temporary inboxes provided by services like Mailinator or 10 Minute Mail. Users create them to grab a download, bypass a gated signup, or avoid spam, and then abandon them immediately.

For marketers, these addresses are toxic. Because they are abandoned instantly, any future emails sent to them will hard bounce. High rates of disposable emails on your list signal poor acquisition practices and can damage your sender reputation with major ISPs.

Regular list hygiene and real-time email validation at signup are the best ways to block disposable domains.