Hello I have exchange 2010 SP1 on a vmware 4.1 esx. Sometime (1 or 2 times per day) the outbound queue to our relay, freeze for 30mn or 1hour. nothing to do, restart transport service, restart relay ... mail don't go. Then outbound queue empty itself and work fine. when outbound freeze, we received all external mail. In the time of a freeze i had logged on the excahnge server and make a telnet to the relay and send manually a mail, that work. I had delete and create the outbound connector. thanks

From my experience that's caused by connectivity problems. Your server has trouble connecting to the destination server or smart host. Is your send connector configured to use a smart host? If so, you might want to reevaluate whether that is necessary.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hello, yes my connector is configure to use a smarthost, but when the problem arrived, i had make a telnet directely from exchange server to smarthost and send manually mail with no problem. How can i look if it is a connectivity problem ? thanks

Hi, Is this queue for a perticular domain ?. What have you used in smart host field "IP" or FQDN of hostname, try to use IP address in place of host name here and have a try.. Stop any A/V service for some time on server and then reproduce this issue. Had you reboot server since you have encounter this. If still no luck then enable protocol logging on Transport service and share log with us. Enable protocol logging on a Send Connector:: http://exchangepedia.com/2007/05/exchange-server-2007-logging-smtp-protocol-activity.html http://technet.microsoft.com/en-us/library/bb124531.aspxAnil MCC 2011,ITIL V3,MCSA 2003,MCTS 2011, My Blog : http://messagingschool.wordpress.com

That may not tell you anything if the problem is intermittent.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hi, I test with IP against FQDN, but the problem persist, i have reboot the server a lot of time. i had enable protocol log and here the result 2011-05-23T07:10:57.524Z,mail.domain.com,08CDE4F6027AF1A5,2,200.0.0.218:30530,192.168.250.250:25,<,220 fw.domain.com Sendmail ready. , 2011-05-23T07:10:57.524Z,mail.domain.com,08CDE4F6027AF1A5,3,200.0.0.218:30530,192.168.250.250:25,>,EHLO mail.domain.com, 2011-05-23T07:10:57.524Z,mail.domain.com,08CDE4F6027AF1A5,4,200.0.0.218:30530,192.168.250.250:25,<,"500 Syntax Error, command unrecognized", 2011-05-23T07:10:57.524Z,mail.domain.com,08CDE4F6027AF1A5,5,200.0.0.218:30530,192.168.250.250:25,>,HELO mail.domain.com, 2011-05-23T07:10:57.524Z,mail.domain.com,08CDE4F6027AF1A5,6,200.0.0.218:30530,192.168.250.250:25,<,"250 fw.domain.com pleased to meet you, mail.domain.com", 2011-05-23T07:10:57.524Z,mail.domain.com,08CDE4F6027AF1A5,7,200.0.0.218:30530,192.168.250.250:25,*,428688,sending message 2011-05-23T07:10:57.524Z,mail.domain.com,08CDE4F6027AF1A5,8,200.0.0.218:30530,192.168.250.250:25,>,MAIL FROM:<Evelyne.Laura@domain.com>, 2011-05-23T07:10:57.524Z,mail.domain.com,08CDE4F6027AF1A5,9,200.0.0.218:30530,192.168.250.250:25,<,"250 sender is <Evelyne.Laura@domain.com>, sender OK", 2011-05-23T07:10:57.524Z,mail.domain.com,08CDE4F6027AF1A5,10,200.0.0.218:30530,192.168.250.250:25,>,RCPT TO:<mone.christian@yahoo.fr>, 2011-05-23T07:10:57.524Z,mail.domain.com,08CDE4F6027AF1A5,11,200.0.0.218:30530,192.168.250.250:25,<,"250 recipient <mone.christian@yahoo.fr>, recipient OK", 2011-05-23T07:10:57.649Z,mail.domain.com,08CDE4F6027AF1A5,12,200.0.0.218:30530,192.168.250.250:25,>,DATA, 2011-05-23T07:10:57.649Z,mail.domain.com,08CDE4F6027AF1A5,13,200.0.0.218:30530,192.168.250.250:25,<,354 OK End with <CRLF>.<CRLF>, 2011-05-23T07:18:27.859Z,mail.domain.com,08CDE4F6027AF1A5,14,200.0.0.218:30530,192.168.250.250:25,-,,Remote 2011-05-23T07:18:35.609Z,mail.domain.com,08CDE730C3A2DB4E,0,,192.168.250.250:25,*,,attempting to connect 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,1,200.0.0.218:30642,192.168.250.250:25,+,, 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,2,200.0.0.218:30642,192.168.250.250:25,<,220 fw.domain.com Sendmail ready. , 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,3,200.0.0.218:30642,192.168.250.250:25,>,EHLO mail.domain.com, 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,4,200.0.0.218:30642,192.168.250.250:25,<,"500 Syntax Error, command unrecognized", 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,5,200.0.0.218:30642,192.168.250.250:25,>,HELO mail.domain.com, 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,6,200.0.0.218:30642,192.168.250.250:25,<,"250 fw.domain.com pleased to meet you, mail.domain.com", 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,7,200.0.0.218:30642,192.168.250.250:25,*,428703,sending message 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,8,200.0.0.218:30642,192.168.250.250:25,>,MAIL FROM:<Laetizia.Barbin@domain.com>, 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,9,200.0.0.218:30642,192.168.250.250:25,<,"250 sender is <Laetizia.Barbin@domain.com>, sender OK", 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,10,200.0.0.218:30642,192.168.250.250:25,>,RCPT TO:<marie-noelle.halbwax@dgfip.finances.gouv.fr>, 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,11,200.0.0.218:30642,192.168.250.250:25,<,"250 recipient <marie-noelle.halbwax@dgfip.finances.gouv.fr>, recipient OK", 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,12,200.0.0.218:30642,192.168.250.250:25,>,RCPT TO:<evelynemartiska@aol.fr>, 2011-05-23T07:18:35.625Z,mail.domain.com,08CDE730C3A2DB4E,13,200.0.0.218:30642,192.168.250.250:25,<,"250 recipient <evelynemartiska@aol.fr>, recipient OK", 2011-05-23T07:18:35.703Z,mail.domain.com,08CDE730C3A2DB4E,14,200.0.0.218:30642,192.168.250.250:25,>,DATA, rhe first mail from evelyne.laura spend a lot of time (no larg mail) and when it will send the other mail go. thank you for help

First, I find it odd that your smart host won't accept an EHLO command. If all your outbound mail is going to a smart host and that smart host is causing you a delay, then I suggest that your problem is due to the smart host.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

On Mon, 23 May 2011 13:46:35 +0000, Ed Crowley [MVP] wrote: > > >First, I find it odd that your smart host won't accept an EHLO command. It doesn't advertise "ESMTP" in the 220 banner so it not accepting the EHLO isn't a surprise. >If all your outbound mail is going to a smart host and that smart host is causing you a delay, then I suggest that your problem is due to the smart host. It's never completing the DATA portion of the conversation. It could be something like a MTU size mismatch causing packet fragmentation, but that's just a wild guess. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Thank you for reply, how can i see if the cause is a packet fragmentation ?

On Tue, 24 May 2011 06:23:13 +0000, yannick67 wrote: >Thank you for reply, how can i see if the cause is a packet fragmentation ? A simple, but not definitive, test would be "ping <ip-address> -l 1472 -f". If it doesn't fail then the route doesn't contain any odd-sized MTUs or devices that add data to a full-size packet. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Hi, Have you tried to create a new send connector to check the result? Does the issue occur when the message includes certain sender and reception or it occurs occasionally? At this stage, I suggest you create another Send connector and reproduce the symptom. If the issue persists, I suggest you capture a netmon trance for research: [Netmon] ========== 1) Please download netmon tool at below link and install it on the Exchange server. http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=983b941d-06cb-4658-b7f6-3088333d062f 2) Launch Microsoft Network Monitor 3.4, click File -> New -> Capture. On the right panel, click “Select Networks” tab, and check the VPN connection. Click “Tools”->”Options”. increase the temporary capture file size to at least 100MB. Then click “Capture”->”start”. Note: Click Capture just before we reproduce the problem. Otherwise, the NetMon log may not capture the required information because we limit the buffer size to 100M. 3) Please reproduce the issue. Let me know the detailed time when the issue happens and the name of the problematic DC it access. 4) Switch back to Network Monitor, click “Capture” -> “Stop”, click “File” -> “Save As” to save it to a .cap file. Send the log file to me and I will be glad to assist you to analyze it. Thanks. Novak Wu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Thank you for reply, i test ping, and all packets were ok.

Hi, I also create a new connector and the problem persist. I will install and run Netmon, but the problem occurs occasionally, some day 5 times, another 1 time, i must look log continually for launch netmon When i'll got the file i will send you. thanks

On Wed, 25 May 2011 09:35:30 +0000, yannick67 wrote: >Thank you for reply, i test ping, and all packets were ok. As I said, it was just a wild guess. Now it's time for a network monitor. Wireshark works pretty well. Or you can use NetMon. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Hi, When the issue reoccurs, please take some times to perform the suggestions in above post and collect the netmon log for research. If there is any progress or question, please feel free to post it here. Thanks. Novak Wu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi i had install NM but i'm not in office for 5 days, so i can't monitoring the server, i test next week. thks

Ok. If there is any progress, please feel free to post it here to discuss. Regards, Novak Wu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

hi i send you the capture make with NM, i'm looking to have another capture. thanks

No. I haven’t received any message with netmon log file. What’s the size of the file? If the file is too large, I suggest you attach the file via following steps. For your convenience, I have created a workspace for you. You can upload the information files to the following link. (Please choose "Send Files to Microsoft") Workspace URL: (https://sftasia.one.microsoft.com/choosetransfer.aspx?key=a1b26d5f-963d-49e0-8010-ca790b3de0a6 ) Password: Ie)gofXih4yl Note: Due to differences in text formatting with various email clients, the workspace link above may appear to be broken. Please be sure to include all text between '(' and ')' when typing or copying the workspace link into your browser. Thanks. Novak Wu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

hi i send the file, the connector is 192.168.250.250 thanks

i send you another file with more data from this morning.

have you got the file ? the problem persist