MailProbe Uses 1,400-Domain List to Auto-Detect Disposable Email Signups

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Disposable email addresses pose a growing problem for online platforms, quietly degrading open rates and inflating bounce complaints after free-tier signups. Manual review of suspicious addresses is inconsistent and unscalable, prompting developers to seek automated solutions. MailProbe, a self-hosted email verification tool, maintains a curated list of roughly 1,400 known disposable domains and checks each signup address against it via a fast, local dictionary lookup requiring no network call. The tool also performs syntax checks, MX record lookups, and role-address detection in a single API response, with the disposable check designed to short-circuit costlier operations when a match is found. Because the disposable-provider landscape changes frequently, the list requires regular scheduled updates — recommended weekly — to remain effective.

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