Dim MMsg As New MailMessage
Dim view As AlternateView = AlternateView.CreateAlternateViewFromString(MMsg.Body, Nothing, "text/html")
Dim logo As LinkedResource = New LinkedResource(HttpContext.Current.Server.MapPath("image001.jpg"))
logo.ContentId = "image"
View.LinkedResources.Add(logo)
MMsg.AlternateViews.Add(View)
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然後在mail內容加上這句語法即可
"<img src=cid:image>"