static void Main(string[] args)
{
//普通测试
SmtpMailClient client = new SmtpMailClient("smtp.163.com", 25, true, "XXX", "XXX");
client.Timeout = 18000;
MailMessage msg = new MailMessage();
msg.From = new MailAccount("*****@*****.**", "janky");
msg.AddTo(new MailAccount("*****@*****.**", "测试1"));
msg.AddTo(new MailAccount("*****@*****.**"));
msg.AddCC(new MailAccount("*****@*****.**"));
//msg.AddCC(new MailAccount("*****@*****.**"));
msg.MailContent = "<p>IHU 发信IP因发送垃圾邮件或存在异常的连接行为，被暂时挂起。请检测发信IP在历史上的发信情况和发信程序是否存在异常；</p><a href='http://163.com'>163 邮箱</a>";
msg.Subject = "测试";
msg.IsHtml = true;
client.Send(msg);
//附件测试
client = new SmtpMailClient("smtp.163.com", 25, true, "XXX", "XXX");
client.Timeout = 18000;
msg = new MailMessage();
msg.From = new MailAccount("*****@*****.**", "janky");
msg.AddTo(new MailAccount("*****@*****.**", "测试1"));
msg.AddTo(new MailAccount("*****@*****.**"));
msg.AddCC(new MailAccount("*****@*****.**"));
msg.MailContent = "<img src='cid:test1234' /><p>IHU 发信IP因发送垃圾邮件或存在异常的连接行为，被暂时挂起。请检测发信IP在历史上的发信情况和发信程序是否存在异常；</p><a href='http://163.com'>163 邮箱</a>";
msg.Subject = "测试";
msg.IsHtml = true;
msg.AddAttachment(@"c:\test\test.txt");
msg.AddAttachment(@"c:\test\taiwan.jpg", "test1234"); //这里是content-id
msg.AddAttachment(@"c:\test\filechktool.rar");
client.SendAsync(msg);
//ssl 测试
SmtpServerInfo info = new SmtpServerInfo("smtp.gmail.com", 465, true, "XXX", "janky,.XXX");
info.EnableSsl = true;
client = new SmtpMailClient(info);
client.Timeout = 18000;
msg = new MailMessage();
msg.From = new MailAccount("*****@*****.**", "系统");
msg.AddTo(new MailAccount("*****@*****.**", "测试1"));
msg.AddTo(new MailAccount("*****@*****.**"));
msg.AddCC(new MailAccount("*****@*****.**"));
msg.MailContent = "<p>IHU 发信IP因发送垃圾邮件或存在异常的连接行为，被暂时挂起。请检测发信IP在历史上的发信情况和发信程序是否存在异常；</p><a href='http://163.com'>163 邮箱</a>";
msg.Subject = "测试";
msg.IsHtml = true;
client.Send(msg);
Console.ReadKey();
}