YesMail launches e-mail appending service

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Chicago--YesMail Inc., a unit of CMGI Inc., on Monday officially launched an e-mail appending service for marketers. E-mail appending is a practice that matches e-mail addresses to marketers' existing offline customer files, which typically include postal addresses and demographic data about the customer. YesMail, which is primarily an e-mail marketing company, has more than 42 million e-mail and postal addresses in its own database.
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