Hyperlink problem in Mail

 I am sending a mail from asp.net. I used the following coding.
            Dim Mail As New System.Web.Mail.MailMessage()
            Mail.To = txtEmail.Text.Trim()
            Mail.From = ConfigurationManager.AppSettings("EmailAddress")
            Dim Msg As New StringBuilder
            Msg.Append("You recently requested your password from www.abc.com." + vbNewLine + vbNewLine)
            Msg.Append("Your password to sign on to www.abc.com is test123")
            Msg.Append(vbNewLine)
        ...