SmtpClient.Send()在Windows 7中超时 [英] SmtpClient.Send() Times out in Windows 7

问题描述

大家好，

我正在努力使我们的开发人员从Windows XP升级到Windows 7.我从ASP.NET Web应用程序发送电子邮件时遇到问题，该应用程序在XP/IIS 6中运行良好.在Windows 7上运行Web应用程序时，我不断收到超时错误:操作已超时"，但电子邮件最终将在约5分钟后发送.

这是我用来发送电子邮件的代码:

Hi All,

I am working on getting our development staff upgraded to Windows 7 from windows XP. I am having an issue with sending emails from my ASP.NET web application, which runs fine in XP/IIS 6. When running the web application on Windows 7 I keep getting a timeout error: "System.Net.Mail.SmtpException: The operation has timed out" however the email will eventually be delivered ~5 minutes later.

Here is the code I use to send the email:

SmtpClient client = new SmtpClient();
client.Host = "SMTP.domain.xyz";
client.Port = 25;
client.ServicePoint.MaxIdleTime = 1;

MailMessage message = new MailMessage();
message.To.Add(new MailAddress("[e-mail]"));
message.From = new MailAddress("[e-mail]");
message.Subject = "Test Email";
message.Body = "Here is the email";
client.Send(message);

如果将以上代码放在命令行应用程序或Windows Forms应用程序中，则可以正常工作.我认为这与IIS有关，但我一生无法解决.

我已经在web.config中添加了一些诊断程序，它提供了以下内容:

The above code works fine if I put it in a Command Line application or a Windows Forms application. I think it is something to do with IIS but I cannot for the life of me figure it out.

I''ve added some diagnostics to the web.config and it gives the following:

System.Net Information: 0 : [6860] Current OS installation type is 'Client'.
System.Net Verbose: 0 : [7748] SmtpClient::.ctor()
System.Net Information: 0 : [7748] Associating SmtpClient#41622463 with SmtpTransport#31364015
System.Net Verbose: 0 : [7748] Exiting SmtpClient::.ctor() 	-> SmtpClient#41622463
System.Net Information: 0 : [7748] Associating MailMessage#28379535 with Message#64109423
System.Net Verbose: 0 : [7748] SmtpClient#41622463::Send(MailMessage#28379535)
System.Net Information: 0 : [7748] SmtpClient#41622463::Send(DeliveryMethod=Network)
System.Net Information: 0 : [7748] Associating SmtpClient#41622463 with MailMessage#28379535
System.Net Information: 0 : [7748] Associating SmtpTransport#31364015 with SmtpConnection#21943666
System.Net Information: 0 : [7748] Associating SmtpConnection#21943666 with ServicePoint#53052340
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Socket(InterNetwork#2)
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Socket() 
System.Net.Sockets Verbose: 0 : [7748] Socket#46228029::Socket(InterNetworkV6#23)
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#46228029::Socket() 
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Connect(48:25#813428447)
System.Net.Sockets Information: 0 : [7748] Socket#5896758 - Created connection from 127.0.0.1:52182 to 198.238.123.48:25.
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Connect() 
System.Net.Sockets Verbose: 0 : [7748] Socket#46228029::Close()
System.Net.Sockets Verbose: 0 : [7748] Socket#46228029::Dispose()
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#46228029::Close() 
System.Net Information: 0 : [7748] SmtpPooledStream#49129953 - Created connection from 127.0.0.1:52182 to 198.238.123.48:25.
System.Net Information: 0 : [7748] Associating SmtpConnection#21943666 with SmtpPooledStream#49129953
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Receive()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Receive
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 32 32 30 20 6F 69 63 31-6D 78 6F 6C 79 30 31 2E : 220 servername.
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 6F 69 63 31 2E 77 61 2E-6C 63 6C 20 4D 69 63 72 : domain.xxx.xxx Micr
System.Net.Sockets Verbose: 0 : [7748] 00000020 : 6F 73 6F 66 74 20 45 53-4D 54 50 20 4D 41 49 4C : osoft ESMTP MAIL
System.Net.Sockets Verbose: 0 : [7748] 00000030 : 20 53 65 72 76 69 63 65-2C 20 56 65 72 73 69 6F :  Service, Versio
System.Net.Sockets Verbose: 0 : [7748] 00000040 : 6E 3A 20 36 2E 30 2E 33-37 39 30 2E 34 36 37 35 : n: 6.0.3790.4675
System.Net.Sockets Verbose: 0 : [7748] 00000050 : 20 72 65 61 64 79 20 61-74 20 20 4D 6F 6E 2C 20 :  ready at  Mon, 
System.Net.Sockets Verbose: 0 : [7748] 00000060 : 32 32 20 4F 63 74 20 32-30 31 32 20 30 39 3A 32 : 22 Oct 2012 09:2
System.Net.Sockets Verbose: 0 : [7748] 00000070 : 30 3A 33 32 20 2D 30 37-30 30 20 0D 0A          : 0:32 -0700 ..
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Receive() 	-> 125#125
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Send()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Send
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 45 48 4C 4F 20 4F 49 43-57 4B 44 30 32 39 37 33 : EHLO workstationname
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 0D 0A                                           : ..
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Send() 	-> 18#18
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Receive()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Receive
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 32 35 30 2D 6F 69 63 31-6D 78 6F 6C 79 30 31 2E : 250-servername.
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 6F 69 63 31 2E 77 61 2E-6C 63 6C 20 48 65 6C 6C : domain.xxx.xxx Hell
System.Net.Sockets Verbose: 0 : [7748] 00000020 : 6F 20 5B 31 39 38 2E 32-33 38 2E 32 35 32 2E 31 : o [198.238.252.1
System.Net.Sockets Verbose: 0 : [7748] 00000030 : 30 36 5D 0D 0A 32 35 30-2D 54 55 52 4E 0D 0A 32 : 06]..250-TURN..2
System.Net.Sockets Verbose: 0 : [7748] 00000040 : 35 30 2D 53 49 5A 45 0D-0A 32 35 30 2D 45 54 52 : 50-SIZE..250-ETR
System.Net.Sockets Verbose: 0 : [7748] 00000050 : 4E 0D 0A 32 35 30 2D 50-49 50 45 4C 49 4E 49 4E : N..250-PIPELININ
System.Net.Sockets Verbose: 0 : [7748] 00000060 : 47 0D 0A 32 35 30 2D 44-53 4E 0D 0A 32 35 30 2D : G..250-DSN..250-
System.Net.Sockets Verbose: 0 : [7748] 00000070 : 45 4E 48 41 4E 43 45 44-53 54 41 54 55 53 43 4F : ENHANCEDSTATUSCO
System.Net.Sockets Verbose: 0 : [7748] 00000080 : 44 45 53 0D 0A 32 35 30-2D 38 62 69 74 6D 69 6D : DES..250-8bitmim
System.Net.Sockets Verbose: 0 : [7748] 00000090 : 65 0D 0A 32 35 30 2D 42-49 4E 41 52 59 4D 49 4D : e..250-BINARYMIM
System.Net.Sockets Verbose: 0 : [7748] 000000A0 : 45 0D 0A 32 35 30 2D 43-48 55 4E 4B 49 4E 47 0D : E..250-CHUNKING.
System.Net.Sockets Verbose: 0 : [7748] 000000B0 : 0A 32 35 30 2D 56 52 46-59 0D 0A 32 35 30 2D 58 : .250-VRFY..250-X
System.Net.Sockets Verbose: 0 : [7748] 000000C0 : 2D 45 58 50 53 20 47 53-53 41 50 49 20 4E 54 4C : -EXPS GSSAPI NTL
System.Net.Sockets Verbose: 0 : [7748] 000000D0 : 4D 20 4C 4F 47 49 4E 0D-0A 32 35 30 2D 58 2D 45 : M LOGIN..250-X-E
System.Net.Sockets Verbose: 0 : [7748] 000000E0 : 58 50 53 3D 4C 4F 47 49-4E 0D 0A 32 35 30 2D 41 : XPS=LOGIN..250-A
System.Net.Sockets Verbose: 0 : [7748] 000000F0 : 55 54 48 20 47 53 53 41-50 49 20 4E 54 4C 4D 20 : UTH GSSAPI NTLM 
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Receive() 	-> 256#256
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Receive()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Receive
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 4C 4F 47 49 4E 0D 0A 32-35 30 2D 41 55 54 48 3D : LOGIN..250-AUTH=
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 4C 4F 47 49 4E 0D 0A 32-35 30 2D 58 2D 4C 49 4E : LOGIN..250-X-LIN
System.Net.Sockets Verbose: 0 : [7748] 00000020 : 4B 32 53 54 41 54 45 0D-0A 32 35 30 2D 58 45 58 : K2STATE..250-XEX
System.Net.Sockets Verbose: 0 : [7748] 00000030 : 43 48 35 30 0D 0A 32 35-30 20 4F 4B 0D 0A       : CH50..250 OK..
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Receive() 	-> 62#62
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Send()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Send
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 4D 41 49 4C 20 46 52 4F-4D 3A 3C 43 41 50 65 72 : MAIL FROM:<email>
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 40 6F 69 63 2E 77 61 2E-67 6F 76 3E 0D 0A       : @domain.xxx>..
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Send() 	-> 30#30
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Receive()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Receive
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 32 35 30 20 32 2E 31 2E-30 20 43 41 50 65 72 40 : 250 2.1.0 email@
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 6F 69 63 2E 77 61 2E 67-6F 76 2E 2E 2E 2E 53 65 : domain.xxx....Se
System.Net.Sockets Verbose: 0 : [7748] 00000020 : 6E 64 65 72 20 4F 4B 0D-0A                      : nder OK..
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Receive() 	-> 41#41
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Send()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Send
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 52 43 50 54 20 54 4F 3A-3C 73 68 61 6E 65 66 40 : RCPT TO:<myemail@>
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 6F 69 63 2E 77 61 2E 67-6F 76 3E 0D 0A          : domain.xxx>..
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Send() 	-> 29#29
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Receive()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Receive
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 32 35 30 20 32 2E 31 2E-35 20 73 68 61 6E 65 66 : 250 2.1.5 myemail
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 40 6F 69 63 2E 77 61 2E-67 6F 76 20 0D 0A       : @domain.xxx ..
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Receive() 	-> 30#30
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Send()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Send
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 44 41 54 41 0D 0A                               : DATA..
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Send() 	-> 6#6
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Receive()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Receive
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 33 35 34 20 50 6C 65 61-73 65 20 73 74 61 72 74 : 354 Please start
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 20 6D 61 69 6C 20 69 6E-70 75 74 2E 0D 0A       :  mail input...
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Receive() 	-> 30#30
System.Net Information: 0 : [7748] HeaderCollection#10675717::Set(Content-Transfer-Encoding=base64)
System.Net Information: 0 : [7748] HeaderCollection#10675717::Set(Content-Transfer-Encoding=quoted-printable)
System.Net Information: 0 : [7748] Associating Message#64109423 with HeaderCollection#16754362
System.Net Information: 0 : [7748] HeaderCollection#16754362::Remove(Content-Type)
System.Net Information: 0 : [7748] HeaderCollection#16754362::Set(MIME-Version=1.0)
System.Net Information: 0 : [7748] HeaderCollection#16754362::Remove(Sender)
System.Net Information: 0 : [7748] HeaderCollection#16754362::Remove(Cc)
System.Net Information: 0 : [7748] HeaderCollection#16754362::Remove(Reply-To)
System.Net Information: 0 : [7748] HeaderCollection#16754362::Remove(Bcc)
System.Net Information: 0 : [7748] HeaderCollection#16754362::Get(MIME-Version)
System.Net Information: 0 : [7748] HeaderCollection#16754362::Get(From)
System.Net Information: 0 : [7748] HeaderCollection#16754362::Get(To)
System.Net Information: 0 : [7748] HeaderCollection#16754362::Get(Date)
System.Net Information: 0 : [7748] HeaderCollection#16754362::Get(Subject)
System.Net Information: 0 : [7748] HeaderCollection#10675717::Get(Content-Type)
System.Net Information: 0 : [7748] HeaderCollection#10675717::Get(Content-Transfer-Encoding)
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Send()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Send
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 4D 49 4D 45 2D 56 65 72-73 69 6F 6E 3A 20 31 2E : MIME-Version: 1.
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 30 0D 0A 46 72 6F 6D 3A-20 43 41 50 65 72 40 6F : 0..From: email@d
System.Net.Sockets Verbose: 0 : [7748] 00000020 : 69 63 2E 77 61 2E 67 6F-76 0D 0A 54 6F 3A 20 73 : omain.xxx..To: m
System.Net.Sockets Verbose: 0 : [7748] 00000030 : 68 61 6E 65 66 40 6F 69-63 2E 77 61 2E 67 6F 76 : [e-mail]
System.Net.Sockets Verbose: 0 : [7748] 00000040 : 0D 0A 44 61 74 65 3A 20-32 32 20 4F 63 74 20 32 : ..Date: 22 Oct 2
System.Net.Sockets Verbose: 0 : [7748] 00000050 : 30 31 32 20 30 39 3A 32-31 3A 35 33 20 2D 30 37 : 012 09:21:53 -07
System.Net.Sockets Verbose: 0 : [7748] 00000060 : 30 30 0D 0A 53 75 62 6A-65 63 74 3A 20 45 6D 61 : 00..Subject: Tes
System.Net.Sockets Verbose: 0 : [7748] 00000070 : 69 6C 20 66 72 6F 6D 20-53 49 4D 42 41 0D 0A 43 : t Email..C
System.Net.Sockets Verbose: 0 : [7748] 00000080 : 6F 6E 74 65 6E 74 2D 54-79 70 65 3A 20 74 65 78 : ontent-Type: tex
System.Net.Sockets Verbose: 0 : [7748] 00000090 : 74 2F 70 6C 61 69 6E 3B-20 63 68 61 72 73 65 74 : t/plain; charset
System.Net.Sockets Verbose: 0 : [7748] 000000A0 : 3D 75 73 2D 61 73 63 69-69 0D 0A 43 6F 6E 74 65 : =us-ascii..Conte
System.Net.Sockets Verbose: 0 : [7748] 000000B0 : 6E 74 2D 54 72 61 6E 73-66 65 72 2D 45 6E 63 6F : nt-Transfer-Enco
System.Net.Sockets Verbose: 0 : [7748] 000000C0 : 64 69 6E 67 3A 20 71 75-6F 74 65 64 2D 70 72 69 : ding: quoted-pri
System.Net.Sockets Verbose: 0 : [7748] 000000D0 : 6E 74 61 62 6C 65 0D 0A-0D 0A                   : ntable....
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Send() 	-> 218#218
System.Net Information: 0 : [7748] HeaderCollection#10675717::Get(Content-Transfer-Encoding)
System.Net Information: 0 : [7748] HeaderCollection#10675717::Get(Content-Transfer-Encoding)
System.Net Information: 0 : [7748] HeaderCollection#10675717::Get(Content-Transfer-Encoding)
System.Net Information: 0 : [7748] HeaderCollection#10675717::Get(Content-Transfer-Encoding)
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Send()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Send
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 48 65 72 65 20 69 73 20-74 68 65 20 65 6D 61 69 : Here is the emai
System.Net.Sockets Verbose: 0 : [7748] 00000010 : 6C                                              : l
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Send() 	-> 17#17
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Send()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Send
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 0D 0A                                           : ..
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Send() 	-> 2#2
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Send()
System.Net.Sockets Verbose: 0 : [7748] Data from Socket#5896758::Send
System.Net.Sockets Verbose: 0 : [7748] 00000000 : 0D 0A 2E 0D 0A                                  : .....
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Send() 	-> 5#5
System.Net.Sockets Verbose: 0 : [7748] Socket#5896758::Receive()
System.Net.Sockets Verbose: 0 : [4584] Socket#5896758::Dispose()
System.Net.Sockets Error: 0 : [7748] Exception in the Socket#5896758::Receive - A blocking operation was interrupted by a call to WSACancelBlockingCall
System.Net Verbose: 0 : [4584] SmtpPooledStream::Dispose #49129953
System.Net.Sockets Verbose: 0 : [7748] Exiting Socket#5896758::Receive() 	-> 0#0
System.Net Verbose: 0 : [4584] Exiting SmtpPooledStream::Dispose #49129953
System.Net Error: 0 : [7748] Exception in the SmtpClient#41622463::Send - Unable to read data from the transport connection: A blocking operation was interrupted by a call to WSACancelBlockingCall.
System.Net Error: 0 : [7748]    at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   at System.Net.DelegatedStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   at System.Net.BufferedReadStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   at System.Net.Mail.SmtpReplyReaderFactory.ReadLines(SmtpReplyReader caller, Boolean oneLine)
   at System.Net.Mail.SmtpReplyReaderFactory.ReadLine(SmtpReplyReader caller)
   at System.Net.Mail.DataStopCommand.Send(SmtpConnection conn)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
System.Net Verbose: 0 : [7748] Exiting SmtpClient#41622463::Send()</email>

推荐答案

通过从遇到问题的计算机上远程登录到您的邮件服务器，然后从命令提示符下发送手动输入的电子邮件，可以对其进行细分.您应该看到错误出现，并且能够阅读消息.

不要使用退格键，并且在第一次使用时正确使用它.


telnet SMTP.domain.xyz 25

helo SMTP.domain.xyz

邮件来自:[e-mail]

rcpt至:[e-mail]
数据
主题:-type-
.
退出

您可以使用smtp异常类来获取有关所发生事件的更精确信息，我上周不得不做这些事情来弄清楚为什么我无法向某些域发送电子邮件.


[ smtp异常class ^ ]

Your going to have to break it down a little more by telneting into your mailserver from the machine your having trouble with, and sending a hand type email from the command prompt. You should see the error appear, and be able to read the message.

Don''t use the backspace key, and get it right the first time.


telnet SMTP.domain.xyz 25

helo SMTP.domain.xyz

mail from: [e-mail]

rcpt to: [e-mail]
data
subject: -type-
.
quit

You can use the smtp exception class, to get more precise information on what''s happening, I had to do these things last week to figure out why I could not send email to certain domains.


[smtp exception class^]

事实证明，造成超时问题的是Symantec.禁用POP3/SMTP扫描器功能后，我可以通过本地网络发送电子邮件.我仍然不知道为什么Symantec仅导致我的网站而不是Windows Forms应用程序出现问题.我只能假定它与IIS 7.5与SMTP的工作方式有关.

As it turns out it was Symantec that was causing the timeout issue. When I disabled the POP3/SMTP scanner feature I could send emails through my local web. I still don''t know why Symantec only causes problems with my website and not the Windows Forms application. I can only assume it has something to do with changes in how IIS 7.5 works with SMTP.

这篇关于SmtpClient.Send()在Windows 7中超时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！