Header information

The block of text that appears at the top of an email may include a lot of gibberish describing the electronic delivery path. It also contains handy information such as the time and date the message was sent, and alerts you to attachments. The most important information included in all email headers is the sender's name and/or email address, the recipient's name and/or email address, and the subject line.

Write short, descriptive subject lines. Many people read emails (or not!) based on what the subject line says. Seven to eight words should be enough to get your point across and grab your readers' interest.