I deployed Rollup 6 for Exchange 2007 SP1 in my test lab and it breaks the system. Now no test users are able to send and receive emails. There is an error in even log every time when someone tries to send and receive.
Source: MSExchange Store Driver
Event ID : 1011 and 1012
The store driver encountered a poison message during message submission. The submission will be stopped for event 1469 on mailbox f6238ff5-abe3-4555-b1ec-8c8e93d85609 Mdb d274a90c-0495-4029-8b11-a4e068115bc5.
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The store driver failed to submit event 1469 mailbox f6238ff5-abe3-4555-b1ec-8c8e93d85609 MDB d274a90c-0495-4029-8b11-a4e068115bc5 and couldn't generate an NDR due to exception System.TypeInitializationException: The type initializer for 'Microsoft.Mapi.ExRpcPerf' threw an exception. ---> Microsoft.Mapi.MapiExceptionLowLevelInitializationFailure: MapiExceptionLowLevelInitializationFailure: ec=-2147467259 (0x80004005)
at Microsoft.Mapi.ExRpcModule.Bind()
at Microsoft.Mapi.ExRpcPerf..cctor()
--- End of inner exception stack trace ---
at Microsoft.Mapi.ExRpcPerf.ConnectionCacheBirth(Int32 maxConnections)
at Microsoft.Exchange.Data.Storage.ConnectionCachePool.GetConnectionCache(String server, ConnectFlag connectFlags)
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.OpenAsTransport(ExchangePrincipal mailboxOwner)
at Microsoft.Exchange.MailboxTransport.StoreDriver.SubmissionItem.OpenStore()
at Microsoft.Exchange.MailboxTransport.StoreDriver.SubmissionItem.LoadFromStore()
at Microsoft.Exchange.MailboxTransport.StoreDriver.MailItemSubmitter.<SubmitNdrForPoisonMessage>b__5()
at Microsoft.Exchange.MailboxTransport.StoreDriver.StorageExceptionHandler.RunUnderExceptionHandler(IMessageConverter converter, StoreDriverDelegate workerFunction)
at Microsoft.Exchange.MailboxTransport.StoreDriver.MailItemSubmitter.SubmitNdrForPoisonMessage().
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Its good that I have not deployed it in production.
Stupid rollup.