I am not a spammer!
Extracto de wiki de SpamAssasin : http://spamassassin.apache.org/ Some Tips for Legitimate Senders to Avoid False Positives
Domain Keys, DomainKeys Identified Mail
omainKeys is an e-mail authentication system (developed at Yahoo!) designed to verify the DNS domain of an E-mail sender and the message integrity. The DomainKeys specification has adopted aspects of Identified Internet Mail to create an enhanced protocol called DomainKeys
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