ASP.NET Core 1.0实现邮件发送功能

准备将一些项目迁移到 asp.net core 先从封装类库入手，在遇到邮件发送类时发现在 asp.net core 1.0中并示提供smtp相关类库，于是网上一搜发现了mailkit 

好东西一定要试一下，何况是开源，下面是代码可实现smtp邮件发送： 

using mailkit.net.smtp;
using mailkit.security;
using mimekit;
using system.threading.tasks;

namespace consoleapp1
{
 public class mailhelper
 {
  public static void send(string email, string subject, string message)
  {
   var emailmessage = new mimemessage();
   emailmessage.from.add(new mailboxaddress("tianwei blogs", "[e-mail]"));
   emailmessage.to.add(new mailboxaddress("mail", email));
   emailmessage.subject = subject;
   emailmessage.body = new textpart("plain") { text = message };

   using (var client = new smtpclient())
   {
    client.connect("smtp.hantianwei.cn", 465, true);
    client.authenticate("[e-mail]", "******");

    client.send(emailmessage);
    client.disconnect(true);

   }
  }

  public static async task sendemailasync(string email, string subject, string message)
  {
   var emailmessage = new mimemessage();

   emailmessage.from.add(new mailboxaddress("tianwei blogs", "[e-mail]"));
   emailmessage.to.add(new mailboxaddress("mail", email));
   emailmessage.subject = subject;
   emailmessage.body = new textpart("plain") { text = message };

   using (var client = new smtpclient())
   {
    await client.connectasync("smtp.hantianwei.cn", 25, securesocketoptions.none).configureawait(false);
    await client.authenticateasync("[e-mail]", "******");
    await client.sendasync(emailmessage).configureawait(false);
    await client.disconnectasync(true).configureawait(false);
    
   }
  }

 }
} 

以上代码同步异步都没有问题
 注：一般邮箱如腾讯企业邮、163等都可以发送成功，但阿里云邮件推送失败，如果有高手可实现阿里云推送邮件请告诉我一下，非常感谢！

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