Question

My app is sending 3 emails at the same time to the recipient, one being the correct email, and the other two contain the subject line, but an empty message. Could this code some how cause that? If not what do you suggest?

 var fromAddress = new MailAddress(domainAddress, displayName);
        var toAddress = new MailAddress(oInfo.SiteUser.email, oInfo.customerName);
        var Bcc = new MailAddress("deleted");
        var smtp = new SmtpClient
        {
            Host = SmtpHost(),
            Port = SmtpPort(),
            EnableSsl = true,

            DeliveryMethod = SmtpDeliveryMethod.Network,
            UseDefaultCredentials = false,
            Credentials = new NetworkCredential(SmtpUsername(), SmtpPassword())
        };

using (var msg = new MailMessage(fromAddress, toAddress)
        {
            IsBodyHtml = true,
            Subject = "Confirmation for your recent order at " + displayName,
            Body = body

        })
        {
            msg.Bcc.Add(Bcc);
            smtp.Send(msg);
        }

Answer 1

No, that code won’t send more than one mail.

Either you have some more code that is sending mail, or you are executing that code three times, but with different values for body.