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Whitelist affects only Anti-Spam filters and not email security and content filtering.
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Whitelisting an internal user defeats the purpose of the Anti-Spoofing filter.Entering too many keywords increases the possibility of emails not getting filtered by GFI MailEssentials and delivered to users’ mailboxes. In Keyword Whitelist it is recommended to add terms that spammers do not use and terms that relate to the nature of your business, e.g.Using the Auto Whitelist feature is highly recommended since this eliminates a high percentage of false positives.The Whitelist and Auto Whitelist features are enabled by default.