This is a guest post by Charles. If you would like to write for DailyTechPost, check out Join DTP. E-mails have advanced greatly in the past few years. One major change is the protection against spam. Though promotional mails have been negatively viewed, there are still those people who don’t mind receiving such mails. These people want to get updates about products and services at once. At times, business firms use promotional emails to announce discounted prices and bonus packages.