One advantage of most e-mail readers is their capability to process HTML formatting within the message body. This enables an e-mail to present itself just like a Web page. The System.Web.Mail namespace contains a format object called MailFormat with two enumerated types: Text or HTML. To set the MailMessage format property just assign it a value from the MailFormat object as follows : mailObj.BodyFormat = MailFormat.Text or mailObj.BodyFormat = MailFormat.HTML |