腾讯邮箱

MailMessage mailMsg = new MailMessage();//实例化对象
mailMsg.From = new MailAddress("发件邮箱", "发件人");
mailMsg.To.Add(new MailAddress("收件邮箱"));
mailMsg.Subject =发送邮件的标题;
StringBuilder sb = new StringBuilder();
sb.Append(添加内容);
mailMsg.Body = sb.ToString();//发送邮件的内容
//指定smtp服务地址（根据发件人邮箱指定对应SMTP服务器地址）
SmtpClient client = new SmtpClient();//格式：smtp.126.com smtp.164.com
client.Host = "smtp.qq.com";
//要用587端口
client.Port = 587;//端口
//加密
client.EnableSsl = true;
//通过用户名和密码验证发件人身份
client.Credentials = new NetworkCredential("发件邮箱", "发件邮箱授权码"); // //发送邮件