One thing you might look into, it may or may not be related. I used to send mail out to a unix smarthost. Every once in a while week or 2 weeks, the queue would start to fill up and stop sending. The only way would be to restart smtp or re-create the connector then mail would flow out again. After opening a case with MS, he had me configure registry entry to supress state changes http://www.microsoft.com/technet/prodtechnol/exchange/guides/E2k3TransnR outing/93366a5b-cab0-4e4e-8f8f-66282c3dafd7.mspx which stops sending link state updates to the unix box. After this change it stops occuring. According to MS since these link state updates are propriety and sending them to the unix box was causing some issues. It may or may not apply to you. I would see if Barracuda has anything to say first. -----Original Message----- From: Danny [mailto:nocmonkey@xxxxxxxxx] Sent: Monday, January 09, 2006 2:14 PM To: [ExchangeList] Subject: [exchangelist] Re: Weird SMTP Problem http://www.MSExchange.org/ On 1/9/06, Rich Gallo <RGallo@xxxxxxxxxxxxxxxxx> wrote: > This has been a problem on my Exchange 2003 server and I am not sure > where to turn. We have a Barracuda box set up as our Inbound/Outbound > Gateway/Relay for email. For some reason, every now and again, the > Outbound Connection to my Barracuda box on Exchange gets blocked up > and stops sending the mail through. The queue builds up until I > notice it and the only way to push the mail through is to restart the > SMTP service on Exchange and it all goes. Any ideas on how I should > troubleshoot this problem??? Thanks again all!! Besides contacting Barracuda support and/or performing a network sniff to see if there are timeouts or network errors, I would check the error log on the Barracuda and Exchange server. What is the status of these queued items? ...D -- CPDE - Certified Petroleum Distribution Engineer CCBC - Certified Canadian Beer Consumer ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: chongja@xxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to info@xxxxxxxxxxxxxx