MailMessage MyMailMessage = new MailMessage(); Message.From = new MailAddress("myEmail"); Message.To.Add("DestinationEmail"); Message.Subject = "test"; AlternateView HTMLView = AlternateView.CreateAlternateViewFromString("<img src=cid:SampleEmbedImage>", null, "text/html"); LinkedResource MySampleEmbedImage = new LinkedResource("C:\\Pictures\\Pic1.jpg"); MySampleEmbedImage.ContentId = "SampleEmbedImage"; HTMLView.LinkedResources.Add(MySampleEmbedImage); Message.AlternateViews.Add(HTMLView); SmtpClient smtp = new SmtpClient("mail.MyMailServer.com"); smtp.Send(Message);