DOCUMENT:Q298836 16-AUG-2002 [exchange] TITLE :XIMS: Exchange Server 5.5 Generates Error Messages PRODUCT :Microsoft Exchange PROD/VER::5.5,5.5 SP1,5.5 SP2,5.5 SP3,5.5 SP4 OPER/SYS: KEYWORDS:exc55 exc55sp1 exc55sp2 exc55sp3 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, versions 5.5, 5.5 SP1, 5.5 SP2, 5.5 SP3, 5.5 SP4 ------------------------------------------------------------------------------- SYMPTOMS ======== If a Post Office Protocol version 3 (POP3) or Internet Message Access Protocol, Version 4rev1 (IMAP4) client polls an Exchange Server 5.5 mailbox that contains more than 65,535 messages, the client session may either time out, or the user may receive an error message. In addition, the following event will be logged in the application event log on the server: Event ID: 13005 Event Source: MSExchange Pop3 Interface Event Category: Authentication Event Type: Error Description: Logon attempt by DOMAIN\user from 127.0.0.1 to domain/mailbox has failed: EcQueryRows() call failed with error Unspecified error. CAUSE ===== Microsoft Exchange Server 5.5 does not support using a POP3 or IMAP4 client to read mailboxes containing more than 65,535. This is a known design limitation. WORKAROUND ========== To work around this problem: - Either use a MAPI client to read the mailbox or install mailbox agents or event sinks to process and remove mail in real time. If you do so, you avoid the possibility of a mailbox reaching this size limit. -or- - Upgrade to Microsoft Exchange 2000 Server; this problem has been resolved in Exchange 2000. STATUS ====== Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. MORE INFORMATION ================ If you establish a POP3 session through Telnet to the Exchange Server and connect to a mailbox with more than 65,535 items in the inbox, you may receive an error message similar to the following after you issue the pass command: telnet 110 +OK Microsoft Exchange POP3 server version 5.5.2655.20 ready user domain\user/mailbox +OK pass -ERR Unspecified error Additional query words: ====================================================================== Keywords : exc55 exc55sp1 exc55sp2 exc55sp3 Technology : kbExchangeSearch kbExchange550 kbZNotKeyword2 kbExchange550SP1 kbExchange550SP2 kbExchange550SP3 kbExchange550SP4 Version : :5.5,5.5 SP1,5.5 SP2,5.5 SP3,5.5 SP4 Hardware : x86 Issue type : kbprb Solution Type : kbnofix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.