CDO Error message - transport lost connection

BigBrett · Post by **BigBrett** » Fri Feb 03, 2006 8:29 am

As stated in the topic title, the DragNet log shows this error when trying to send notification email.

The SMTP server logs show that the connection was dropped just after a successful RCPT TO command as follows:

02/03/06 16:11:46 220 xxxxxxxx.co.za ESMTP MailEnable Service, Version: 0-1.72- ready at 02/03/06 16:11:46
02/03/06 16:11:46 HELO XXXXX 250 Requested mail action okay, completed
02/03/06 16:11:46 MAIL FROM: <noreply@xxxxxxxx.co.za> 250 Requested mail action okay, completed
02/03/06 16:12:58 RCPT TO: <brett@xxxxxxxx.co.za> 250 Requested mail action okay, completed

The same sequence occurs with every email notification. What is also strange is that there is a gap of over a minute between the MAIL FROM and the RCPT TO. I'm not sure if this is causing any problems as I see that the SMTP timeout in DragNet is set to 30 (seconds I assume). Should this be a higher value or not ?

Post by **jclausius** » Fri Feb 03, 2006 8:46 am

Yes, you can increase that value. Is there anything in the Dragnet Server log file related to SMTP errors? By default, the Dragnet Server log file can be found in %WINDIR%\TEMP\SGDRAGNET on your Dragnet Server.

BigBrett · Post by **BigBrett** » Sun Feb 05, 2006 11:28 pm

I increased the SMTP timeout to 120 but no improvement.

The DragNet log shows the following for the latest failed attempt:

2006-02-06 07:24:44.225 SendEmailNotification Failure - To: brett@xxxxxxxx.co.za Subject: [Dragnet Change (Bug) - AllyCAD 3.5 - Civil Designer 6.4:9] Pan only works if the cursor is moved between every successive pan Error: Could not access 'CDO.Message' object.[Exception has been thrown by the target of an invocation. [The transport lost its connection to the server. ]]

SMTP logs for the same time as follows:

Activity log
02/06/06 07:24:17 220 xxxxxxxx.co.za ESMTP MailEnable Service, Version: 0-1.72- ready at 02/06/06 07:24:17
02/06/06 07:24:17 HELO NIMDA 250 Requested mail action okay, completed
02/06/06 07:24:17 MAIL FROM: <noreply@xxxxxxxx.co.za> 250 Requested mail action okay, completed
02/06/06 07:25:29 RCPT TO: <brett@xxxxxxxx.co.za> 250 Requested mail action okay, completed

Debug log
02/06/06 07:25:29 ME-E0070: (recv) socket [340] error during [RCPT] command from host 10.10.15.22. Socket was disconnected - Error: (10053)

BigBrett · Post by **BigBrett** » Mon Feb 06, 2006 7:39 am

Email has all of a sudden started to flow. The problem is therefore solved even though I have no idea of what might have changed to make it so.

Post by **jclausius** » Mon Feb 06, 2006 9:01 am

If things flare back up, take a look at your network setup.

The error message indicates something is causing the network connection between the Dragnet and SMTP servers to be dropped.