In e-mail marketing, reputation is everything. Users are able to make a decision about your e-mail without even opening it — if they don't like what they see in the "Subject" or "From" lines, the delete key is never far away. Marketers also must contend with the negative connotation of "spam" — consumers apply the term to any unwanted e-mails, even if they are legitimate marketing messages to which recipients have opted in. To top it off, ISPs — always looking to streamline their networks and respond to customers' frustrations — create their own barriers. Our experts examine the ways in which e-mail marketers can manage their reputation.