Good morning all,I'm having a problem regarding sending and receiving internal email with Microsoft Exchange Server 2007. Two weeks ago its still functioning well, but suddenly cannot send and receive internal email after i restarted the server due to lacking of the server. From the event viewer on that server, i found the following errors, but i can't found any solutions for it. Any guidance and advices from you all would be greatly appreciated. Thanks!__________________________________________________________________________________________________________Source: MSExchange Store DriverCategory: MSExchangeStoreDriverEventID: 1012Description: The store driver failed to submit event 37895 mailbox 3eb31fc6-e969-434c-8482-93281158f11c MDB dd7c6ec2-12ed-4f72-9e6b-dfb2d946166e 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, ADOrgPerson delegateUser, Object identity, OpenMailboxSessionFlags flags) at Microsoft.Exchange.Data.Storage.MailboxSession.CreateMailboxSession(LogonType logonType, ExchangePrincipal owner, ADOrgPerson 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.______________________________________________________________________________________________________________Source: MSExchange Store DriverCategory: MSExchangeStoreDriverEventID: 1011The store driver encountered a poison message during message submission. The submission will be stopped for event 37895 on mailbox 3eb31fc6-e969-434c-8482-93281158f11c Mdb dd7c6ec2-12ed-4f72-9e6b-dfb2d946166e.______________________________________________________________________________________________________________The following is the message tracking log for the exchange server.#Software: Microsoft Exchange Server#Version: 8.0.0.0#Log-type: Message Tracking Log#Date: 2007-11-29T02:24:45.296Z#Fields: date-time,client-ip,client-hostname,server-ip,server-hostname,source-context,connector-id,source,event-id,internal-message-id,message-id,recipient-address,recipient-status,total-bytes,recipient-count,related-recipient-address,reference,message-subject,sender-address,return-path,message-info2007-11-29T02:24:45.296Z,192.168.*.*,SERVER,,SERVER,"MDBd7c6ec2-12ed-4f72-9e6b-dfb2d946166e, Mailbox:73736ac1-b55d-4954-9414-eb7cdc0eb77d, Event:37709, MessageClass:IPM.Note, CreationTime:2007-11-29T02:24:28.218Z, ClientType:User",,STOREDRIVER,SUBMIT,,,,,,,,,,,,UnexpectedNDRGenerationFailureForPoison2007-11-29T02:37:34.468Z,192.168.*.*,SERVER,,SERVER,"MDBd7c6ec2-12ed-4f72-9e6b-dfb2d946166e, Mailbox:73736ac1-b55d-4954-9414-eb7cdc0eb77d, Event:37713, MessageClass:IPM.Note, CreationTime:2007-11-29T02:37:17.625Z, ClientType:User",,STOREDRIVER,SUBMIT,,,,,,,,,,,,UnexpectedNDRGenerationFailureForPoison2007-11-29T05:42:48.859Z,192.168.*.*,SERVER,,SERVER,"MDBd7c6ec2-12ed-4f72-9e6b-dfb2d946166e, Mailbox10e602c-ae6b-42ad-a057-531b526aff76, Event:37759, MessageClass:IPM.Note, CreationTime:2007-11-29T05:42:31.921Z, ClientType:User",,STOREDRIVER,SUBMIT,,,,,,,,,,,,UnexpectedNDRGenerationFailureForPoison2007-11-29T05:48:08.625Z,192.168.*.*,SERVER,,SERVER,"MDBd7c6ec2-12ed-4f72-9e6b-dfb2d946166e, Mailbox:0c7b22a3-b86d-4dd5-8bd7-bfef964f056f, Event:37781, MessageClass:IPM.Note, CreationTime:2007-11-29T05:46:51.875Z, ClientType:User",,STOREDRIVER,SUBMIT,,,,,,,,,,,,UnexpectedNDRGenerationFailureForPoison

Any Luck on this issue? I see the same thing.

hi, the problem had been solved after i reset the modem. i dunno why, but its work for me. u can have a try.

This really does not ahve anything to do with modems, but thanks.