Redmond launches a legal offensive against those it says are infringing on its brands and trademarks.
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New version boasts deeper integration with company's other marketing technologies, including automation and cross-channel analysis tools.
The three marketing trade groups endorse a set of principles for responsible e-mail and skip any spam definition.
UPDATE: The company bills it as its largest online advertising effort to date, including a two-day blitz to reach 80 percent of Web users.
Consumers have become adept at sorting wanted e-mail from unwanted spam.