Error ZCSExchangeMigrationWizard-7.1.2.104 import

Hi!
I'm migrating from Exchange 2003 to Zimbra Open Source 7.1.

I'm using the ZCSExchangeMigrationWizard-7.1.2.104 in Windows XP SP3 with Microsoft Outlook 2007.

But appears this errors:

03-10-2011 15:40:58 [580]: ZCSExchangeMigrationWizard-7.1.2.104 Version 7.1
03-10-2011 15:40:58 [580]: Outlook.Application\CurVer: 12
03-10-2011 15:41:06 [580]: RPC Error:- WinHttpSendRequest failed. The RPC request is logged as C:\DOCUME~1\ADMINI~2\CONFIG~1\Temp\ZCSExchangeMigr ationWizard-7.1.2.104\1-RPCErrorRequest.xml
03-10-2011 15:41:06 [580]: RPC Error: One or more errors were found in the Secure Sockets Layer (SSL) certificate sent by the server.
Continue with the invalid certificate?
03-10-2011 15:41:07 [580]: strSvrVersion: 7.1.2_GA_3268 20110804132448 20110804-1327 FOSS
03-10-2011 15:41:07 [580]: dSvrMajorVer: 7.100000
03-10-2011 15:41:07 [580]: dProdMajorVersion: 7.100000
03-10-2011 15:41:07 [580]: wProdMinorVersion: 104
03-10-2011 15:41:07 [580]: Server Minor: 2
03-10-2011 15:41:12 [580]: Picking Objects
03-10-2011 15:41:14 [580]: exStore: /o=Ruguertech/ou=First Administrative Group/cn=Recipients/cn=administrativo
03-10-2011 15:41:14 [580]: Foreignprinciple: ad:administrativo
03-10-2011 15:41:21 [580]: Clearing internal progress log entries
03-10-2011 15:41:21 [580]: Entries cleared
03-10-2011 15:41:24 [580]: Clearing internal progress log entries
03-10-2011 15:41:24 [580]: Entries cleared
03-10-2011 15:41:36 [580]: ------------------Import Options--------------------------
03-10-2011 15:41:36 [580]: Import Mails : Yes
03-10-2011 15:41:36 [580]: Import Contacts : No
03-10-2011 15:41:36 [580]: Import Calendar Items: No
03-10-2011 15:41:36 [580]: Import Tasks : No
03-10-2011 15:41:36 [580]: Import JunkMail : No
03-10-2011 15:41:36 [580]: Import Deleted Items : No
03-10-2011 15:41:36 [580]: Import Sent Items : Yes
03-10-2011 15:41:36 [580]: Import Rules : No
03-10-2011 15:41:36 [580]: UseProgressLogs : No
03-10-2011 15:41:36 [580]: Concurrency : 1
03-10-2011 15:41:36 [580]: MessageLogging : No
03-10-2011 15:41:36 [580]: ----------------------X-X-X-------------------------------
03-10-2011 15:41:38 [580]: Creating / starting 1 worker threads
03-10-2011 15:41:38 [580]: Dispatching work to worker threads
03-10-2011 15:41:38 [580]: Notifying threads to exit
03-10-2011 15:41:38 [3588]: Worker thread started
03-10-2011 15:41:38 [3588]: Waiting for work
03-10-2011 15:41:38 [3588]: Work arrived.../o=Ruguertech/ou=First Administrative Group/cn=Recipients/cn=administrativo administrativo@ruguertech.com.br
03-10-2011 15:41:38 [3588]: Opening other users store
03-10-2011 15:41:38 [3588]: Logging on to zimbra server (192.168.0.248:7071)
03-10-2011 15:41:39 [3588]: Replicating folder hierarchy
03-10-2011 15:41:39 [3588]: (FR): Entering folder: /
03-10-2011 15:42:54 [3588]: FolderName: Itens Enviados 2009 Subject: ENC: 'A- ham' ou ' Hum hum' FolderID: 383
03-10-2011 15:42:54 [3588]: (MI): Batch Adding Message d(Thu, 10 Jul 2008 11:23:03 -0000) fid(383)
03-10-2011 15:42:54 [3588
03-10-2011 15:56:43 [3588]: FolderName: Financeiro Subject: contrato XP FolderID: 399
03-10-2011 15:56:43 [3588]: (MI): Batch Adding Message d(Mon, 25 Jan 2010 10:30:58 -0000) fid(399)
03-10-2011 15:56:50 [3588]: DoFileUpload Failed: Request file is: C:\DOCUME~1\ADMINI~2\CONFIG~1\Temp\ZCSExchangeMigr ationWizard-7.1.2.104\upload_request10032011_155650260.txt
03-10-2011 15:56:51 [3588]: HTTP Response: 413,'null'
03-10-2011 15:56:51 [3588]: **Warning**:Zimbra Exception: message not added, No upload token returned
03-10-2011 15:56:51 [3588]: FolderName: EMAIL 2010 Subject: RES: Boleto da NF 260 (urgente) FolderID: 304
03-10-2011 15:56:51 [3588]: (MI): Batch Adding Message d(Mon, 25 Jan 2010 10:38:35 -0000) fid(304)
03-10-2011 15:56:51 [3588]: BatchRequest::AppendRequest: going for appendChild
03-10-2011 15:56:51 [3588]: BatchRequest::AppendRequest: appendChild done
03-10-2011 15:56:51 [3588]: (MI): Batch Added Message rid(2)
03-10-2011 15:56:51 [3588]: (MI): Executing batch request
03-10-2011 15:56:58 [3588]: (MI): Got response (7053 ms)
03-10-2011 15:57:03 [3588]: FolderName: Financeiro Subject: contrato XP FolderID: 399
03-10-2011 15:57:04 [3588]: (MI): Batch Adding Message d(Mon, 25 Jan 2010 11:11:00 -0000) fid(399)
03-10-2011 15:57:10 [3588]: DoFileUpload Failed: Request file is: C:\DOCUME~1\ADMINI~2\CONFIG~1\Temp\ZCSExchangeMigr ationWizard-7.1.2.104\upload_request10032011_155710545.txt
03-10-2011 15:57:11 [3588]: HTTP Response: 413,'null'
03-10-2011 15:57:11 [3588]: **Warning**:Zimbra Exception: message not added, No upload token returned
03-10-2011 15:57:14 [3588]: FolderName: Financeiro Subject: contato XP FolderID: 399
03-10-2011 15:57:14 [3588]: (MI): Batch Adding Message d(Mon, 25 Jan 2010 11:38:45 -0000) fid(399)
03-10-2011 15:57:17 [3588]: DoFileUpload Failed: Request file is: C:\DOCUME~1\ADMINI~2\CONFIG~1\Temp\ZCSExchangeMigr ationWizard-7.1.2.104\upload_request10032011_155717646.txt
03-10-2011 15:57:18 [3588]: HTTP Response: 413,'null'
03-10-2011 15:57:18 [3588]: **Warning**:Zimbra Exception: message not added, No upload token returned
03-10-2011 15:57:20 [3588]: FolderName: Financeiro Subject: contrato XP 3 e 4 FolderID: 399
03-10-2011 15:57:21 [3588]: (MI): Batch Adding Message d(Mon, 25 Jan 2010 11:40:11 -0000) fid(399)
03-10-2011 15:57:24 [3588]: DoFileUpload Failed: Request file is: C:\DOCUME~1\ADMINI~2\CONFIG~1\Temp\ZCSExchangeMigr ationWizard-7.1.2.104\upload_request10032011_155724047.txt
03-10-2011 15:57:24 [3588]: HTTP Response: 413,'null'
03-10-2011 15:57:24 [3588]: **Warning**:Zimbra Exception: message not added, No upload token returned
03-10-2011 15:57:24 [3588]: Clearing internal progress log entries
03-10-2011 15:57:24 [3588]: Entries cleared
03-10-2011 15:57:24 [3588]: Deleting mapi folder list
03-10-2011 15:57:24 [3588]: **Error**:while importing mailbox administrativo@ruguertech.com.br: error_threshold_reached. Failed to process too many items.
03-10-2011 15:57:24 [3588]: Waiting for work
03-10-2011 15:57:24 [3588]: Worker thread exiting
03-10-2011 15:58:26 [580]: Total errors and warnings in migration:
03-10-2011 15:58:26 [580]: (MI): Number of Errors : 1
03-10-2011 15:58:26 [580]: (MI): Number of Warnings : 4

What could it be?
he full log is attached to this post.

Tahnks.

Something I've noticed, do these e-mails you are importing not have ANY recipient in them?

I'm getting similar (if not identical) errors when specific emails have no recipient (meaning the sender used nothing but BCC).

We have a bank that sends stuff to us like this, and none of those emails are importing.