System.net.mail 腾讯ssl发送邮件超时
我采用了.net 的自带组件 System.Web.Mail.MailMessage发送邮件,主要是在客户注册网站成功的时候发条欢迎邮件,最近邮件无法发送了,看了下腾讯smtp邮件配置,所有的邮件发送都换成ssl了,之前用的是25端口,现在换成了465或587,于是修改代码如下:
MailMessage msgMail = new MailMessage("发件箱", "收件箱", "邮件标题", "邮件内容",2);
SmtpClient smtp = new SmtpClient("smtp.qq.com", 465,2);
smtp.EnableSsl = true;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.Credentials = new System.Net.NetworkCredential("发件箱", "发件箱登录密码",2);
try
{
smtp.Send(msgMail,2);
}
catch (Exception ex)
{
Console.WriteLine("发送完毕......",2);
}
这样还是不行,报操作已超时错误 在国外的技术网站上看到一句话System.Net.Mail支持Explicit SSL但是不支持Implicit SSL,然后查了下关于这两个模式的资料,我按照我理解的说一下:
Explicit SSL 发起于未加密的25,然后进行一个starttl握手,最终切换到加密的连接。
Implicit SSL 直接从指定的端口发起starttl握手。
既然指定了端口,那么应该就是使用了Implicit SSL,不知道微软什么时候能更新下System.net.mail,System.net.mail能在邮件中嵌入图片的。问题到了这里,那是不是就没有办法利用腾讯邮箱发邮件了呢?答案肯定是否定的,foxmail不就可以配置发送邮件吗?我们可以利用CDO.Message和System.web.mail发送邮件。
详见我下面的2篇文章:
C#利用System.web.mail发送邮件
System.Web.Mail.MailMessage mail = new System.Web.Mail.MailMessage(,2);
try
{
mail.To = "收件人邮箱";
mail.From = "发件人邮箱";
mail.Subject = "subject";
mail.BodyFormat = System.Web.Mail.MailFormat.Html;
mail.Body = "<font color='red'>body</font>";
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1",2); //basic authentication
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "发件人邮箱",2); //set your username here
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "发件人邮箱密码",2); //set your password here
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", 465,2);//set port
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", "true",2);//set is ssl
System.Web.Mail.SmtpMail.SmtpServer = "smtp.qq.com";
System.Web.Mail.SmtpMail.Send(mail,2);
//return true;
}
catch (Exception ex)
{
ex.ToString(,2);
}
C#利用CDO.Message发送邮件
如何引用CDO.Message? cod.message的引用位置: C:\Windows\System32\cdosys.dll
CDO.Message objMail = new CDO.Message(,2);
try
{
objMail.To = "接收邮件账号";
objMail.From = "发送邮件账号";
objMail.Subject = "subject";//邮件主题string strHTML = @"";
strHTML = strHTML + "这里可以填写html内容";
objMail.HTMLBody = strHTML;//邮件内容
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserverport"].Value = 465;//设置端口
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserver"].Value = "smtp.qq.com";
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/sendemailaddress"].Value = "发送邮件账号";
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpuserreplyemailaddress"].Value = "发送邮件账号";
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpaccountname"].Value = "发送邮件账号";
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/sendusername"].Value = "发送邮件账号";
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/sendpassword"].Value = "发送邮件账号登录密码";
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/sendusing"].Value = 2;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"].Value = 1;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpusessl"].Value = "true";//这一句指示是否使用ssl
objMail.Configuration.Fields.Update(,2);
objMail.Send(,2);
}
catch (Exception ex) { throw ex; }
finally { }
System.Runtime.InteropServices.Marshal.ReleaseComObject(objMail,2);
objMail = null;
使用SMTP(简单邮件传输协议)发送邮件一般都是使用25端口,而阿里云服务器为了安全是将25端口封禁的,会出现在本机测试发送邮件功能正常,但是部署到服务器上却发送失败的情况。
解决办法是向阿里云申请解封25端口,或者更换端口,可以使用465或者587端口。
代码如下:
1 /// <summary>
2 /// 发送邮件
3 /// </summary>
4 /// <param name="bodyStr">邮件内容</param>
5 /// <param name="title">邮件标题</param>
6 /// <returns>返回结果,成功与否</returns>
7 public static string SendMail(string bodyStr, string title)
8 {
9 SmtpClient smtpClient = new SmtpClient();
10 smtpClient.EnableSsl = true;
11 smtpClient.UseDefaultCredentials = false;
12 smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
13 smtpClient.Host = "smtp.qq.com";
14 smtpClient.Port = 587;//改用587端口
15 smtpClient.Credentials = new System.Net.NetworkCredential("000@qq.com", "abcdefg");
16 //密码不是QQ密码,是qq账户设置里面的POP3/SMTP服务生成的key
17 MailMessage mailMessage = new MailMessage("000@qq.com", "xxx@xxx.com");//from(发出邮箱)和to(目标邮箱)
18 mailMessage.Subject = title;//邮件标题
19 mailMessage.Body = bodyStr;//邮件内容
20 mailMessage.BodyEncoding = System.Text.Encoding.Default;//正文编码
21 mailMessage.IsBodyHtml = true;//设置为HTML格式
22 mailMessage.Priority = MailPriority.High;//优先级
23 mailMessage.To.Add("xxx@xxx.com");
24 mailMessage.To.Add("aaa@xxx.com");
25 mailMessage.To.Add("bbb@xxx.com");
26 mailMessage.To.Add("ccc@xxx.com");//可以发送给多个人
27 try
28 {
29 smtpClient.Send(mailMessage);
30 return "发送成功";
31 }
32 catch (Exception e)
33 {
34 return "发送失败" + e.InnerException.Message;
35 }
36 }

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