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Weed out disposable, non-existent domain or invalid emails to prevent community spamming or more power to free trials

Tempbox is an open-source Mac app for disposable emails powered by mail.tm (A free temp mail service). Create disposable emails with the address of your choice (provided not taken already) or with a random address. Archive the address for later use.

Free API to Block disposable emails - TrustyMails.com