Several questions. I have several emails in the categorizer, as unlocking?. I stopped the antivirus (TrendMicro), restarted the service but can not be unlocked and that is important. SMTP: Message Submitted to Advanced Queuing SMTP: Started Message Submission to Advanced Queuing SMTP: Message Submitted to Categorizer I have Exchange configured correctly, but some will not that little store and get the corresponding NDR has been locked. The Exchange server is correctly to DCs that are GC, inluso, this is DC-GC. I can not watch more. 2 .- There is a way of knowing how many emails are stored in the categorizer?. I think more than one is important for the company.

Check this kb out. This might help you.http://support.microsoft.com/default.aspx/kb/952841

delete key 1?. I have the following:SmtpSvc *- 1 -- Alias -- DL -- Domain -- * -- 00bbac7b-ecfe-45a2-b7f9-69ab4fb3ad99._msdcs.mydomainactivedirectory.com -- domain.com ( name domain external) -- EventManager -- EventTypes ........... ........... ........... -- RoutingSources -- Sessions -- User *- InfoLet alone the key info?Thanks.

I can delete the key 1?. Today I had to go back, emails in the categorizer. I know how many emails there are in the categorizer?

Hi SoniaS, Please let me know the queues name in which emails stuck and "Additional Queue Information" of those queues. You could see the number of messages in queue viewer. Before trying KB952841, please let me know if you have 9005 9002 6006 errors in system event. If not, I suggest you troubleshoot the issue according to "Additional Queue Information". If there is related error in system event, please paste here. Related articles:How to use Queue Viewer to troubleshoot mail flow issues in Exchange Server 2003http://support.microsoft.com/kb/823489/en-usHow to troubleshoot for Exchange Server 2003 transport issueshttp://support.microsoft.com/kb/821910/en-us Hope this helps. Thanks, Elvis