A data breach at one of the world’s largest providers of marketing-email services may have enabled unauthorized people to access the names and email addresses for customers of major financial-services, retailing and other companies.

While no financial information was compromised, the major concern is that the emails and names could be used for “phishing,” that is, phony emails asking unsuspecting consumers to divulge information such as account numbers, log-ins or Social Security numbers. Get the full story »