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A Whitelist is a list of e-mail addresses or domain names from which an e-mail blocking program will allow messages to be received. For example, by including the domain "" in your email's Whitelist, all messages that come from addresses "" will pass through the email program's spam filtering system. If the Whitelist only contained a specific address from this domain, such as "," only messages from the sender "" would be certain to pass through. A Whitelist is often used to compensate for a spam-filtering system that is inadvertently identifying legitimate emails as spam.

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