Website and email newsletter promotion?

It is frequently difficult for observers to distinguish between legitimate and spam e-mail marketing. First off, spammers attempt to represent themselves as legitimate operators, obfuscating the issue. Second, direct-marketing political groups such as the U.S. Direct Marketing Association (DMA) have pressured legislatures to legalize activities which many Internet operators consider to be spamming, such as the sending of "opt-out" unsolicited commercial e-mail. Third, the sheer volume of spam e-mail has led some users to mistake legitimate commercial e-mail (for instance, a mailing list to which the user subscribed) for spam — especially when the two have a similar appearance, as when messages include HTML and flashy graphics.