C#: Send email using SmtpClient

using System.Net.Mail;

//mailFrom > "KSeeSharp " - shows up as "KSeeSharp" as sender
//mailTo > Comma delimited email address(es)
//mailServer > Something like smtp.xyz.com

public bool SendEmail(string mailFrom, string mailTo, string subject, string message, string mailServer)
{
bool returnCode = false;

try
{
MailMessage msg = new MailMessage(mailFrom, mailTo, subject, message);
SmtpClient emailClient = new SmtpClient(mailServer);
emailClient.UseDefaultCredentials = true;
emailClient.Send(msg);

returnCode = true;
}
catch (Exception ex)
{
throw ex
}

return returnCode;
}