C# Choose Email Box when sending

Question

I was wondering if there is any way to send emails to other inboxes, for example gmail

At the moment my code for sending emails is this:

using (var smtpClient = new SmtpClient(WebConfigurationManager.AppSettings["smtpHost"], 587))
{
     smtpClient.Credentials = new NetworkCredential(WebConfigurationManager.AppSettings["smtpClient"],
                                                    WebConfigurationManager.AppSettings["smtpClientPassword"]);
     smtpClient.EnableSsl = true;

     smtpClient.SendCompleted += (s, e) =>
     {
        smtpClient.Dispose();
        ((MailMessage)e.UserState).Dispose();
     };

     await smtpClient.SendMailAsync(model.GetMessage());
}

Is there any class, property in the client, anything I can do to achieve this goal?