asp.net - How to check MailMessage was delivered in .NET?

Question

Is there a way to check if SmtpClient successfully delivered an email? SmtpClient.Send() does not appear to return anything other than an exception. So if the method completes is it safe to assume the email will be successfully sent to the appropriate email box? My code is below:

MailMessage emailMessage = new MailMessage();
emailMessage.Subject = SubjectText;
emailMessage.IsBodyHtml = IsBodyHtml;
emailMessage.Body = BodyText;
emailMessage.From = new MailAddress(Settings.Default.FromEmail,Settings.Default.FromDisplayName);

//add recipients
foreach (string recipientAddress in RecipientAddresses.Split(new char[{','},StringSplitOptions.RemoveEmptyEntries))

emailMessage.To.Add(recipientAddress);

using (SmtpClient smtpClient = new SmtpClient())
{
smtpClient.Send(emailMessage);
}

Answer 1

No, there is no reliable way to find out if a message was indeed delivered.

Doing so will require access to the end SMTP server for every person you are emailing.

If you do not get an exception, you can assume that the SMTP server did its best to deliver the email.