Sometime back in November,2009 our outgoing emails to external addresses were received immediately (as tested on 10Nov2009 10am by me). However; it was the replies back or mail sent to us from these (External email addresses) that were delayed, this might not a user but rather domain issue or mailbox maintenance issue. I used Mail Flow troubleshooter but to no abnormalities found. We have a single domain. As far as troubleshooting, they, external email addresses, would receive our messages and reply, however; we would not receive the reply for 4-12 hours later. We could send immediately but receiving was delayed. Most of the time the sender from the other domain (external such as hotmail) would get a delayed message that their mail was in queue. The only thing happened before this was moving of Exchange mail files from an EVA (a good storage) to a MSA2000 (a cheaper storage than EVA). I had spent also searching to no avail yet. I am afraid if this happens again , my users will going to bug me. Hope to see some light from you guys here inExchange Forums though i am new here. Thanks in advance. -Jeffrey

Hey, Two things would help us here. First is the internet header of the mail which you received delayed and second the NDR message which the sender received. Please paste those here if possible. Thanks Vishal Ramnani MCITP - Exchange 2007, MCSE Messaging, MCTS - Win 2008 Config

Go for EXBPA and also EXPTA and see of there is any unusaual errors logged in http://www.microsoft.com/downloads/details.aspx?FamilyID=DBAB201F-4BEE-4943-AC22-E2DDBD258DF3&displaylang=en http://www.msexchange.org/tutorials/Exchange-2003-Performance-Troubleshooting-Analyzer-Tool-v10-ExPTA.htmlVinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

Thanks for the response Vishal. I shall give them here in a while.

Same to you Vinod. Thank you.

For the headers and NDR message, I was not lucky to have those that time (11-Nov-2009). but next time I need to capture it via the tools provided in Exchange 2007 (my fault).For the ExBPA and PTA, I have several findings which I am examining right now. I am posting here later those. Thanks so much.

These are the error log entries and messages I had last occurrence of this delay.1.Event Type: ErrorEvent Source: MSExchange System Attendant MailboxEvent Category: General Event ID: 4001Date: 11/6/2009Time: 5:05:03 PMUser: N/AComputer: Server02Description:A transient failure has occurred. The problem may resolve itself in awhile. The service will retry in 56 seconds. Diagnostic information: Cannot open mailbox /o=Farhost/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Configuration/cn=Servers/cn=SGAPEX02/cn=Microsoft System Attendant.Microsoft.Exchange.Data.Storage.ConnectionFailedTransientException: Cannot open mailbox /o=Farhost/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Configuration/cn=Servers/cn=SGAPEX02/cn=Microsoft System Attendant. ---> Microsoft.Mapi.MapiExceptionLogonFailed: MapiExceptionLogonFailed: Unable to open message store. (hr=0x80040111, ec=-2147221231)Diagnostic context: Lid: 18969 EcDoRpcExt2 called [length=244] Lid: 27161 EcDoRpcExt2 returned [ec=0x0][length=116][latency=0] Lid: 23226 --- ROP Parse Start --- Lid: 27962 ROP: ropLogon [254] Lid: 17082 ROP Error: 0x80040111 Lid: 26937 Lid: 21921 StoreEc: 0x80040111 Lid: 27962 ROP: ropExtendedError [250] Lid: 1494 ---- Remote Context Beg ---- Lid: 26426 ROP: ropLogon [254] Lid: 59409 Lid: 45073 Lid: 11173 StoreEc: 0x80040111 Lid: 22970 Lid: 8620 StoreEc: 0x80040111 Lid: 1750 ---- Remote Context End ---- Lid: 26849 Lid: 21817 ROP Failure: 0x80040111 Lid: 26297 Lid: 16585 StoreEc: 0x80040111 Lid: 32441 Lid: 1706 StoreEc: 0x80040111 Lid: 24761 Lid: 20665 StoreEc: 0x80040111 Lid: 25785 Lid: 29881 StoreEc: 0x80040111 at Microsoft.Mapi.MapiExceptionHelper.ThrowIfError(String message, Int32 hresult, Int32 ec, DiagnosticContext diagCtx) at Microsoft.Mapi.ExRpcConnection.OpenMsgStore(OpenStoreFlag storeFlags, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, MapiStore msgStorePrivate, String& correctServerDn, ClientIdentityInfo clientIdentityAs, String userDnAs, String applicationId, CultureInfo cultureInfo) at Microsoft.Mapi.ConnectionCache.OpenMapiStore(String mailboxDn, Guid mailboxGuid, Guid mdbGuid, ClientIdentityInfo clientIdentity, String userDnAs, OpenStoreFlag openStoreFlags, CultureInfo cultureInfo, String applicationId) at Microsoft.Mapi.ConnectionCache.OpenMailbox(String mailboxDn, Guid mailboxGuid, Guid mdbGuid, WindowsIdentity windowsIdentityAs, String userDnAs, OpenStoreFlag openStoreFlags, CultureInfo cultureInfo, String applicationId) at Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString, Boolean secondTry) --- End of inner exception stack trace --- at Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString, Boolean secondTry) at Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString, Boolean secondTry) at Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString) at Microsoft.Exchange.Data.Storage.MailboxSession.Initialize(LogonType logonType, ExchangePrincipal owner, DelegateLogonUser delegateUser, Object identity, OpenMailboxSessionFlags flags) at Microsoft.Exchange.Data.Storage.MailboxSession.CreateMailboxSession(LogonType logonType, ExchangePrincipal owner, DelegateLogonUser delegateUser, Object identity, OpenMailboxSessionFlags flags, CultureInfo cultureInfo, String clientInfoString) at Microsoft.Exchange.Data.Storage.MailboxSession.OpenAsAdmin(ExchangePrincipal mailboxOwner, CultureInfo cultureInfo, String clientInfoString, Boolean useLocalRpc, Boolean ignoreHomeMdb) at Microsoft.Exchange.Data.Storage.MailboxSession.OpenAsAdmin(ExchangePrincipal mailboxOwner, CultureInfo cultureInfo, String clientInfoString) at Microsoft.Exchange.Servicelets.SystemAttendantMailbox.Servicelet.Work() For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.2. Delivery Delayed (Data for IT dept case ID: 2739) _____________________________________________From: Microsoft Exchange Sent: 07 November 2009 21:46To: Jeffrey AranaSubject: Delivery Delayed: Data Centre server maintenance 07 November 2009 - Your attention is required Delivery is delayed to these recipients or distribution lists: exadmin@domain.com Subject: Data Centre server maintenance 07 November 2009 - Your attention is required This message has not yet been delivered. Microsoft Exchange will continue to try delivering the message on your behalf. Delivery of this message will be attempted until 11/9/2009 5:45:14 PM (GMT+08:00) Kuala Lumpur, Singapore. Microsoft Exchange will notify you if the message can't be delivered by that time. _____ Sent by Microsoft Exchange Server 2007 Sequence 3. Undeliverable (Case 2739) _____________________________________________From: Microsoft Exchange Sent: 09 November 2009 17:44To: Jeffrey AranaSubject: Undeliverable: Data Centre server maintenance 07 November 2009 - Your attention is required Delivery has failed to these recipients or distribution lists: exadmin@domain.comMicrosoft Exchange has been trying to deliver this message without success and has stopped trying. Please try sending this message again, or provide the following diagnostic text to your system administrator. _____ Sent by Microsoft Exchange Server 2007 -End of messages and event entry-For the BPA nd PTA, issues have been found.