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sbrady
Newbie
Joined: 02 March 2009
Online Status: Offline
Posts: 12
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| Posted: 11 March 2009 at 7:01am | IP Logged
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We are receiving the following error when using mailbee smtp to send a message:
An unhandled exception of type 'MailBee.MailBeeSocketObjectDisposedException' occurred in MailBee.NET.dll
Additional information: The socket object used by MailBee was unexpectedly closed. InnerException message follows: Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
The code causing this error is:
Smtp.LicenseKey = "XXXXX";
Smtp mailer = new Smtp();
mailer.SmtpServers.Add("server.domain.com", @"domain\user name", @"@password");
mailer.Message.From.AsString = "ifamily@domain.com";
mailer.Message.To.AsString = "ifamily@domain.com";
mailer.Message.Subject = "Hi";
mailer.Message.BodyPlainText = "Hello";
mailer.Send();
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Andrew
AfterLogic Support
Joined: 28 April 2006
Location: United States
Online Status: Offline
Posts: 1189
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| Posted: 13 March 2009 at 1:45am | IP Logged
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This exception is thrown when underlying socket operation unexpectedly throws ObjectDisposedException.
There're two typical reasons:
- A firewall/antivirus/antispam software intercept traffic and breaks normal connection flow. We encountered many applications of such kind which have various bugs which causes weird issues.
- The mail server was busy or network connection was under heavy load, so the mail server didn't reply during long time, so the socket was closed by timeout.
If the issue happens occasionally, it most probably is caused by the mail server, but if it happens each time you run the application, you should try to temporarily disable the traffic filter for testing purposes.
Also, logging may shed some light on what exactly goes wrong.
Best regards,
Andrew
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sbrady
Newbie
Joined: 02 March 2009
Online Status: Offline
Posts: 12
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| Posted: 20 March 2009 at 12:18pm | IP Logged
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I've used this SMTP server with stand asp.net smtp controls to send messages without any problem. I am attaching the logging below. It appears that I was able to login and authenticate correctly, but when it tried to send it failed:
[15:15:10.24] [INFO] Assembly version: 5.0.2.121.
[15:15:10.24] [INFO] Will send mail message.
[15:15:10.30] [INFO] Will resolve host "dedun.atum.net".
[15:15:10.30] [INFO] Host "dedun.atum.net" resolved to IP address(es) 216.94.1.241.
[15:15:10.30] [INFO] Will connect to host "dedun.atum.net" on port 25.
[15:15:10.32] [INFO] Socket connected to IP address 216.94.1.241 on port 25.
[15:15:10.43] [RECV] 220 dedun.atum.net Microsoft ESMTP MAIL Service, Version: 6.0.3790.3959 ready at Fri, 20 Mar 2009 15:19:09 -0400 \r\n
[15:15:10.43] [INFO] Connected to mail service at host "dedun.atum.net" on port 25 and ready.
[15:15:10.43] [INFO] Will send Hello command (HELO or EHLO).
[15:15:10.44] [SEND] EHLO atum.com\r\n
[15:15:10.49] [RECV] 250-dedun.atum.net Hello [216.191.53.136] \r\n250-TURN\r\n250-SIZE\r\n250-ETRN\r\n250-PIPELINING\r\n25 0-DSN\r\n250-ENHANCEDSTATUSCODES\r\n250-8bitmime\r\n250-BINA RYMIME\r\n250-CHUNKING\r\n250-VRFY\r\n250-TLS\r\n250-STARTTL S\r\n250-X-EXPS LOGIN\r\n250-X-EXPS=LOGIN\r\n250-AUTH LOGIN\r\n250-AUTH=LOGIN\r\n250-X-LINK2STATE\r\n250-XEXCH50\r \n250 OK\r\n
[15:15:10.51] [INFO] SMTP Hello completed.
[15:15:10.52] [INFO] Will login as "scott brady@atum.net".
[15:15:10.52] [INFO] Will try SASL LOGIN authentication method.
[15:15:10.52] [SEND] AUTH LOGIN\r\n
[15:15:10.58] [RECV] 334 VXNlcm5hbWU6\r\n
[15:15:10.58] [SEND] ********\r\n
[15:15:10.63] [RECV] 334 UGFzc3dvcmQ6\r\n
[15:15:10.65] [SEND] ********\r\n
[15:15:10.69] [RECV] 235 2.7.0 Authentication successful.\r\n
[15:15:10.69] [INFO] Logged in as "scott brady@atum.net".
[15:15:10.69] [INFO] Will send mail message to SMTP server "dedun.atum.net".
[15:15:10.71] [INFO] Will submit sender and recipients.
[15:15:10.72] [SEND] MAIL FROM:<sbrady@atum.com>\r\n
[15:15:10.72] [SEND] RCPT TO:<sbrady@atum.com>\r\n
[15:15:10.77] [RECV] 250 2.1.0 sbrady@atum.com....Sender OK\r\n
[15:15:10.83] [RECV] 250 2.1.5 sbrady@atum.com \r\n
[15:15:10.83] [INFO] Sender and recipients accepted by SMTP server. Will send message data now.
[15:15:10.85] [SEND] BDAT 276 LAST\r\n
[15:15:10.85] [SEND] [Data chunk of 276 bytes sent.]
[15:15:31.41] [INFO] Will disconnect from host "dedun.atum.net".
[15:15:31.41] [INFO] Disconnected from host "dedun.atum.net".
[15:15:31.41] [INFO] Error: The socket object used by MailBee was unexpectedly closed. InnerException message follows: Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
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Igor
AfterLogic Support
Joined: 24 June 2008
Location: United States
Online Status: Offline
Posts: 6104
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| Posted: 20 March 2009 at 2:10pm | IP Logged
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Try to disable CHUNKING ESMTP extension:
Code:
| server.SmtpOptions = ExtendedSmtpOptions.NoChunking |
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It's assumed server is SmtpServer instance which you'll add to Smtp.SmtpServers collection.
Also, you may try to set Global.SafeMode = true prior to creating any instances of SmtpServer and Smtp classes. This will turn the compatibility mode on (the performance will suffer, however).
Regards,
Igor
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sbrady
Newbie
Joined: 02 March 2009
Online Status: Offline
Posts: 12
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| Posted: 23 March 2009 at 6:42am | IP Logged
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Thanks, that worked.
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