C# 发送电子邮件

/// <summary>
/// 发送邮件
/// </summary>
/// <param name="to">收件人【多个以','分隔】</param>
/// <param name="title">标题</param>
/// <param name="body">邮件正文</param>
/// <param name="cc">抄送人【多个以','分隔】</param>
private void SendMail(string to, string title, string body, string cc="")
{
SmtpSection smtpCfg = NetSectionGroup.GetSectionGroup(WebConfigurationManager.OpenWebConfiguration("~/web.config")).MailSettings.Smtp;

System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();
msg.From = new System.Net.Mail.MailAddress(smtpCfg.From, smtpCfg.Network.TargetName, System.Text.Encoding.UTF8);
//msg.To.Add("收件人地址");
string[] temp = to.Trim(',').Split(',');
foreach (var item in temp)
{
msg.To.Add(item + "@XX.com.cn");
}
//msg.CC.Add("抄送人地址");
if (!string.IsNullOrEmpty(cc))
{
temp = cc.Trim(',').Split(',');
foreach (var item in temp)
{
msg.CC.Add(item + "@XX.com.cn");
}
}
msg.Subject = title;
msg.Body = body;
msg.BodyEncoding = System.Text.Encoding.UTF8;//正文编码
msg.IsBodyHtml = true;
msg.Priority = System.Net.Mail.MailPriority.High;//优先级

System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient(smtpCfg.Network.Host,smtpCfg.Network.Port);

smtp.Credentials = new System.Net.NetworkCredential(smtpCfg.Network.UserName, smtpCfg.Network.Password);
try
{
//smtp.SendAsync(msg, "");
//smtp.SendMailAsync("发件人地址","收件人地址","邮件主题","邮件正文");
smtp.SendMailAsync(msg);
}
catch (Exception e)
{
smtp.Send(msg);
//throw new Exception(e.ToString());
}
}