QQ邮箱发送信息不成功，也不报错

Question

using (MailMessage mailmessage = new MailMessage())
using (SmtpClient smtpclient = new SmtpClient("smtp.qq.com"))
{
//填补邮件信息
//mailmessage.To.Add("[e-mail]");
mailmessage.To.Add(diz);//可以有多个
mailmessage.Body = "您好"+Name+"，您的密码设置为初始 密码为123456，登陆后可重新修改。";
mailmessage.From = new MailAddress("[e-mail]");
mailmessage.Subject = "银豪KTV";
smtpclient.Credentials = new System.Net.NetworkCredential("[e-mail]", "邮箱凭证");
smtpclient.Send(mailmessage);//发送

Answer 1

检查邮箱有没有开启smtp支持
检查邮件是不是已经被发送，但是对方当作垃圾邮件没有收

参考代码 https://www.cnblogs.com/pingming/p/4458002.html