前提准备:以QQ邮件为例,前往QQ个人邮箱开启POP3/SMTP服务(腾讯默认关闭状态),开启后获得授权码,并复制保存好。(使用第三方发送邮件,不必填写QQ密码,而是使用授权码)

POP3/SMTP服务开启流程:依次点击设置—账户—往下滑动可看到该服务

需要引用:

using System.Net.Mail;
using System.Net.Mime;

 1 public class myEmailHelper
 2 {
 3             /// <summary>
 4             /// SMTP实例
 5             /// </summary>
 6             static System.Net.Mail.SmtpClient client = null;
 7 
 8             /// <summary>
 9             /// 发送信息
10             /// </summary>
11             /// <param name="Receiver">邮件接收人</param>
12             /// <param name="Subject">邮件主题</param>
13             /// <param name="content">邮件内容</param>    
14             public  void SendEmail(string Receiver, string Subject, string content)
15             {
16                 if (string.IsNullOrEmpty(Receiver) || string.IsNullOrEmpty(Subject)
17                     || string.IsNullOrEmpty(content))
18                 {
19                     throw new ArgumentNullException("SendEmail参数空异常!");
20                 }
21                 if (client == null)
22                 {
23                     try
24                     {
25                         //163发送配置                    
26                         //client = new System.Net.Mail.SmtpClient();
27                         //client.Host = "smtp.163.com";
28                         //client.Port = 25;
29                         //client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
30                         //client.EnableSsl = true;
31                         //client.UseDefaultCredentials = true;
32 
33 
34                         //qq发送配置的参数//切EnableSsl必须设置为true  
35                         client = new System.Net.Mail.SmtpClient();
36                         client.Host = "smtp.qq.com";
37                         client.Port = 25;
38                         client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
39                         client.EnableSsl = true;
40                         client.UseDefaultCredentials = false;
41 
42                         client.Credentials = new System.Net.NetworkCredential("你的邮箱", "授权码");
43                     }
44                     catch (Exception ex)
45                     {
46                         throw ex;
47                     }
48                 }
49                 try
50                 {
51                     System.Net.Mail.MailMessage Message = new System.Net.Mail.MailMessage();
52                     Message.SubjectEncoding = System.Text.Encoding.UTF8;
53                     Message.BodyEncoding = System.Text.Encoding.UTF8;
54                     Message.Priority = System.Net.Mail.MailPriority.High;
55 
56                     Message.From = new System.Net.Mail.MailAddress("你的邮箱", "发送显示名");
57                     //添加邮件接收人地址
58                     string[] receivers = Receiver.Split(new char[] { \',\' });
59                     Array.ForEach(receivers.ToArray(), ToMail => { Message.To.Add(ToMail); });
60 
61                     Message.Subject = Subject;
62                     Message.Body = content;
63                     Message.IsBodyHtml = true;
64                     client.Send(Message);
65                 }
66                 catch (Exception ex)
67                 {
68                     throw ex;
69                 }
70             }
71 }

 Tips:授权码获得之后一定要先复制好,不然下一次获取需要重新生成,避免多余操作。授权码不区分大小写

 

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