无法使用第三方服务器发送电子邮件（IIS 7，Windows Server 2008，ASP.NET）

I am using IIS 7 on Server 2008.

我在Server 2008上使用IIS 7。

I just tried migrating my app from an older platform - everything works fine, except the email feature.

我刚尝试从较旧的平台迁移我的应用程序 - 一切正常,但电子邮件功能除外。

This is my config:

这是我的配置:

< mailSettings >   
      < smtp from="[e-mail]" deliveryMethod="Network" >   
        <  network host="mail.xyz.com" port="25" userName="[e-mail]" password="123"    /> < / smtp  >
    < /mailSettings >

Whenever I need to send an email I use:

每当我需要发送电子邮件时,我都会使用:

 SmtpClient smtp = new SmtpClient();
 smtp.Send(email);

The funny thing is I get absolutely no errors, however the email is never sent.

有趣的是我绝对没有错误,但电子邮件永远不会发送。

The outbound firewall ruleset allows SMTP traffic.

出站防火墙规则集允许SMTP流量。

Any idea what I did wrong?

知道我做错了什么吗?

3 个解决方案

#1

If you aren't getting any exceptions, then I would enable logging for SNM. This will at least show you if the mail was sent by SNM, and if so, then you can look elseware for the problem.

如果您没有得到任何例外,那么我将启用SNM的日志记录。这至少会告诉您邮件是否由SNM发送,如果是,那么您可以查看其他问题。

To enable logging, add the following to your .config file:

要启用日志记录,请将以下内容添加到.config文件中:

<configuration>

<sources>

  <source name="System.Net" >
    <listeners>
      <add name="MyTraceFile"/>
    </listeners>
  </source>

  <source name="System.Net.Sockets">
    <listeners>
      <add name="MyTraceFile"/>
    </listeners>
  </source>

</sources>


<sharedListeners>
  <add
    name="MyTraceFile"
    type="System.Diagnostics.TextWriterTraceListener"
    initializeData="System.Net.trace.log"                />
</sharedListeners>

<switches>
  <add name="System.Net" value="Verbose" />
  <add name="System.Net.Sockets" value="Verbose" />
</switches>

Here is an example log file:

这是一个示例日志文件:

System.Net Verbose: 0 : [0992] SmtpClient::.ctor(host=127.0.0.1)
System.Net Information: 0 : [0992] Associating SmtpClient#47606018 with SmtpTransport#5689696
System.Net Verbose: 0 : [0992] Exiting SmtpClient::.ctor()  -> SmtpClient#47606018
System.Net Verbose: 0 : [0992] SmtpClient#47606018::Send(MailMessage#5138334)
System.Net Information: 0 : [0992] SmtpClient#47606018::Send(DeliveryMethod=Network)
System.Net Information: 0 : [0992] Associating SmtpClient#47606018 with MailMessage#5138334
System.Net Information: 0 : [0992] Associating SmtpTransport#5689696 with SmtpConnection#31950948
System.Net Information: 0 : [0992] Associating SmtpConnection#31950948 with ServicePoint#34920472
System.Net.Sockets Verbose: 0 : [0992] Socket#22453229::Socket(InterNetwork#2)
System.Net.Sockets Verbose: 0 : [0992] Exiting Socket#22453229::Socket() 
System.Net.Sockets Verbose: 0 : [0992] Socket#22453229::Connect(1:25#16777318)
System.Net.Sockets Verbose: 0 : [0992] Exiting Socket#22453229::Connect() 
System.Net Information: 0 : [0992] Associating SmtpConnection#31950948 with SmtpPooledStream#48167163
System.Net.Sockets Verbose: 0 : [0992] Socket#22453229::Receive()
System.Net.Sockets Verbose: 0 : [0992] Data from Socket#22453229::Receive
System.Net.Sockets Verbose: 0 : [0992] 00000000 : 32 32 30 20 77 32 6B 20-4D 69 63 72 6F 73 6F 66 : 220 w2k Microsof
System.Net.Sockets Verbose: 0 : [0992] 00000010 : 74 20 45 53 4D 54 50 20-4D 41 49 4C 20 53 65 72 : t ESMTP MAIL Ser
System.Net.Sockets Verbose: 0 : [0992] 00000020 : 76 69 63 65 2C 20 56 65-72 73 69 6F 6E 3A 20 35 : vice, Version: 5
System.Net.Sockets Verbose: 0 : [0992] 00000030 : 2E 30 2E 32 31 39 35 2E-36 37 31 33 20 72 65 61 : .0.2195.6713 rea
System.Net.Sockets Verbose: 0 : [0992] 00000040 : 64 79 20 61 74 20 20 53-61 74 2C 20 33 31 20 44 : dy at  Sat, 31 D
System.Net.Sockets Verbose: 0 : [0992] 00000050 : 65 63 20 32 30 30 35 20-32 32 3A 31 33 3A 31 34 : ec 2005 22:13:14
System.Net.Sockets Verbose: 0 : [0992] 00000060 : 20 2D 30 36 30 30 20 0D-0A                      :  -0600 ..
System.Net.Sockets Verbose: 0 : [0992] Exiting Socket#22453229::Receive()   -> 105#105
System.Net.Sockets Verbose: 0 : [0992] Socket#22453229::Send()
System.Net.Sockets Verbose: 0 : [0992] Data from Socket#22453229::Send
System.Net.Sockets Verbose: 0 : [0992] 00000000 : 45 48 4C 4F 20 77 32 6B-0D 0A                   : EHLO w2k..
System.Net.Sockets Verbose: 0 : [0992] Exiting Socket#22453229::Send()  -> 10#10
System.Net.Sockets Verbose: 0 : [0992] Socket#22453229::Receive()
System.Net.Sockets Verbose: 0 : [0992] Data from Socket#22453229::Receive
System.Net.Sockets Verbose: 0 : [0992] 00000000 : 32 35 30 2D 77 32 6B 20-48 65 6C 6C 6F 20 5B 31 : 250-w2k Hello [1
System.Net.Sockets Verbose: 0 : [0992] 00000010 : 32 37 2E 30 2E 30 2E 31-5D 0D 0A 32 35 30 2D 41 : 27.0.0.1]..250-A
System.Net.Sockets Verbose: 0 : [0992] 00000020 : 55 54 48 20 47 53 53 41-50 49 20 4E 54 4C 4D 20 : UTH GSSAPI NTLM 
System.Net.Sockets Verbose: 0 : [0992] 00000030 : 4C 4F 47 49 4E 0D 0A 32-35 30 2D 41 55 54 48 3D : LOGIN..250-AUTH=
System.Net.Sockets Verbose: 0 : [0992] 00000040 : 4C 4F 47 49 4E 0D 0A 32-35 30 2D 54 55 52 4E 0D : LOGIN..250-TURN.
System.Net.Sockets Verbose: 0 : [0992] 00000050 : 0A 32 35 30 2D 41 54 52-4E 0D 0A 32 35 30 2D 53 : .250-ATRN..250-S
System.Net.Sockets Verbose: 0 : [0992] 00000060 : 49 5A 45 20 32 30 39 37-31 35 32 0D 0A 32 35 30 : IZE 2097152..250
System.Net.Sockets Verbose: 0 : [0992] 00000070 : 2D 45 54 52 4E 0D 0A 32-35 30 2D 50 49 50 45 4C : -ETRN..250-PIPEL
System.Net.Sockets Verbose: 0 : [0992] 00000080 : 49 4E 49 4E 47 0D 0A 32-35 30 2D 44 53 4E 0D 0A : INING..250-DSN..
System.Net.Sockets Verbose: 0 : [0992] 00000090 : 32 35 30 2D 45 4E 48 41-4E 43 45 44 53 54 41 54 : 250-ENHANCEDSTAT
System.Net.Sockets Verbose: 0 : [0992] 000000A0 : 55 53 43 4F 44 45 53 0D-0A 32 35 30 2D 38 62 69 : USCODES..250-8bi
System.Net.Sockets Verbose: 0 : [0992] 000000B0 : 74 6D 69 6D 65 0D 0A 32-35 30 2D 42 49 4E 41 52 : tmime..250-BINAR
System.Net.Sockets Verbose: 0 : [0992] 000000C0 : 59 4D 49 4D 45 0D 0A 32-35 30 2D 43 48 55 4E 4B : YMIME..250-CHUNK
System.Net.Sockets Verbose: 0 : [0992] 000000D0 : 49 4E 47 0D 0A 32 35 30-2D 56 52 46 59 0D 0A 32 : ING..250-VRFY..2
System.Net.Sockets Verbose: 0 : [0992] 000000E0 : 35 30 20 4F 4B 0D 0A                            : 50 OK..
System.Net.Sockets Verbose: 0 : [0992] Exiting Socket#22453229::Receive()   -> 231#231
System.Net.Sockets Verbose: 0 : [0992] Socket#22453229::Send()
System.Net.Sockets Verbose: 0 : [0992] Data from Socket#22453229::Send
System.Net.Sockets Verbose: 0 : [0992] 00000000 : 4D 41 49 4C 20 46 52 4F-4D 3A 3C 6D 65 40 6D 79 : MAIL FROM:..
System.Net.Sockets Verbose: 0 : [0992] Exiting Socket#22453229::Send()  -> 30#30
System.Net.Sockets Verbose: 0 : [0992] Socket#22453229::Receive()
System.Net.Sockets Verbose: 0 : [0992] Data from Socket#22453229::Receive
System.Net.Sockets Verbose: 0 : [0992] 00000000 : 32 35 30 20 32 2E 31 2E-30 20 6D 65 40 6D 79 63 : 250 2.1.0 me@myc
System.Net.Sockets Verbose: 0 : [0992] 00000010 : 6F 6D 70 61 6E 79 2E 63-6F 6D 2E 2E 2E 2E 53 65 : ompany.com....Se
System.Net.Sockets Verbose: 0 : [0992] 00000020 : 6E 64 65 72 20 4F 4B 0D-0A                      : nder OK..
System.Net.Sockets Verbose: 0 : [0992] Exiting Socket#22453229::Receive()   -> 41#41
System.Net.Sockets Verbose: 0 : [0992] Socket#22453229::Send()
System.Net.Sockets Verbose: 0 : [0992] Data from Socket#22453229::Send
System.Net.Sockets Verbose: 0 : [0992] 00000000 : 52 43 50 54 20 54 4F 3A-3C 68 69 6D 40 68 69 73 : RCPT TO:..
System.Net.Sockets Verbose: 0 : [0992] Exiting Socket#22453229::Send()  -> 30#30
System.Net.Sockets Verbose: 0 : [0992] Socket#22453229::Receive()
System.Net.Sockets Verbose: 0 : [0992] Data from Socket#22453229::Receive
System.Net.Sockets Verbose: 0 : [0992] 00000000 : 35 35 30 20 35 2E 37 2E-31 20 55 6E 61 62 6C 65 : 550 5.7.1 Unable
System.Net.Sockets Verbose: 0 : [0992] 00000010 : 20 74 6F 20 72 65 6C 61-79 20 66 6F 72 20 68 69 :  to relay for hi
System.Net.Sockets Verbose: 0 : [0992] 00000020 : 6D 40 68 69 73 63 6F 6D-70 61 6E 79 2E 63 6F 6D : [e-mail]
System.Net.Sockets Verbose: 0 : [0992] 00000030 : 0D 0A                                           : ..
System.Net.Sockets Verbose: 0 : [0992] Exiting Socket#22453229::Receive()   -> 50#50
System.Net Error: 0 : [0992] Exception in the SmtpClient#47606018::Send - Mailbox unavailable. The server response was: 5.7.1 Unable to relay for [e-mail]
System.Net Error: 0 : [0992]    at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
System.Net.Sockets Verbose: 0 : [0992] Socket#22453229::Dispose()
System.Net Verbose: 0 : [0992] Exiting SmtpClient#47606018::Send() 

More information can be found at my faq, here: http://systemnetmail.com/faq/4.10.aspx

更多信息可以在我的常见问题解答中找到,请访问:http://systemnetmail.com/faq/4.10.aspx

99% of the time, if no exception is thrown, the email was accepted by the relay server, and it is now sitting in the relay server queue. Or, it actually did get delivered, but it was marked as spam, so it's in the recipients spam folder (or the destination server rejected it).

99%的时间,如果没有抛出异常,则中继服务器接受该电子邮件,并且它现在位于中继服务器队列中。或者,它实际上已经交付,但它被标记为垃圾邮件,因此它位于收件人垃圾邮件文件夹(或目标服务器拒绝它)。

#2

Try this code. this too sends an email via smtp.

试试这个代码。这也是通过smtp发送电子邮件。

using System.Net;

bool bSuccess;
    //the the SMTP host.
             SmtpClient client = new SmtpClient();

             //SMTP Server
             client.Host = CommonVariables.EMAIL_SMTP_SERVER;

             //SMTP Credentials
             client.Credentials = new NetworkCredential(CommonVariables.EMAIL_USERNAME, CommonVariables.EMAIL_PASSWORD);

             //Creating a new mail.
             MailMessage mail = new MailMessage();

             //Filling 'From' Tab.
             mail.From = new MailAddress(CommonVariables.EMAIL_SENDERS_ADDRESS, CommonVariables.EMAIL_SENDERS_NAME);


                mail.To.Add("[e-mail]");


             //Filling mail body.
             string szMailBody = "hhgjhgjhg";
             string szMailSubject = "sdsds";



             mail.Body = szMailBody;

             mail.Subject = szMailSubject;

             //Send Email.
             try
             {
                client.Send(mail);
                bSuccess = true;
             }
             catch (Exception Ex)
             {
                bSuccess = false;
             }

             // Clean up.
             mail.Dispose();

For this you dont need to do setting in web.config.

为此,您不需要在web.config中进行设置。

#3

from this forum:

来自这个论坛:

System.Net.Mail.SmtpClient mailClient = new System.Net.Mail.SmtpClient();

System.Net.Mail.SmtpClient mailClient = new System.Net.Mail.SmtpClient();

mailClient.EnableSsl = true;

mailClient.EnableSsl = true;

also

in web.config set defaultCredentials = false;

在web.config中设置defaultCredentials = false;