Outlook物件寄信如何能收到Html格式的信件(編號:6339)

使用到下列參數及內容但是都收到文字檔不成功,還請高手賜教!!
strBody = strBody & "MIME-Version: 1.0"
strBody = strBody & "Content-Type: text/html;
charset=big5"
strBody = strBody & "<!DOCTYPE HTML PUBLIC ""-//W3C//DTD
HTML 4.0 Transitional//EN"">"
strBody = strBody & "<html><head>"
strBody =....... 略

.Recipients.Add strTemp '收件人
.Subject = strSubject '主旨
.Body = strBody '內容
.Save '存入寄件夾
.Send '出信件