Outlook Error Messages

This is a list of possible error codes that may be returned by Outlook and Outlook Express. The error codes may be returned when a failure occurs sending and receiving mail.

General Errors
-------------- 

        ERROR CODE   ERROR TYPE                     DESCRIPTION
        ----------   ------------------------       ---------------------------------
        0x800CCC00   LOAD_SICILY_FAILED             Authentication did not load.
        0x800CCC01   INVALID_CERT_CN                Invalid certificate content.
        0x800CCC02   INVALID_CERT_DATE              Invalid certificate date.
        0x800CCC03   ALREADY_CONNECTED              User already connected.
        0x800CCC04   CONN
        0x800CCC05   NOT_CONNECTED                  Not connected to server.
        0x800CCC06   CONN_SEND
        0x800CCC07   WOULD_BLOCK
        0x800CCC08   INVALID_STATE
        0x800CCC09   CONN_RECV
        0x800CCC0A   INCOMPLETE                     Message download incomplete.
        0x800CCC0B   BUSY                           Server or maildrop is busy.
        0x800CCC0C   NOT_INIT
        0x800CCC0D   CANT_FIND_HOST                 Cannot locate server.
        0x800CCC0E   FAILED_TO_CONNECT              Cannot connect to server.
        0x800CCC0F   CONNECTION_DROPPED             Connection closed.
        0x800CCC10   INVALID_ADDRESS                Address not known on server.
        0x800CCC11   INVALID_ADDRESS_LIST           Mailing list not known on server.
        0x800CCC12   SOCKET_READ_ERROR              Unable to send WINSOCK request.
        0x800CCC13   SOCKET_WRITE_ERROR             Unable to read Winsock reply.
        0x800CCC14   SOCKET_INIT_ERROR              Unable to initialize Winsock.
        0x800CCC15   SOCKET_CONNECT_ERROR           Unable to open Windows Socket.
        0x800CCC16   INVALID_ACCOUNT                User account not recognized.
        0x800CCC17   USER_CANCEL                    User canceled operation.
        0x800CCC18   SICILY_LOGON_FAILED            Logon attempt failed.
        0x800CCC19   TIMEOUT
        0x800CCC1A   SECURE_CONNECT_FAILED          Unable to connect using Secure 
                                                    Sockets Layer (SSL).

WINSOCK Errors 
-------------- 

        ERROR CODE   ERROR TYPE                     DESCRIPTION
        ----------   ------------------------       ------------------------------------
        0x800CCC40   WINSOCK_WSASYSNOTREADY         Network subsystem is unusable.
        0x800CCC41   WINSOCK_WSAVERNOTSUPPORTED     Windows Sockets cannot support this
                                                    application.
        0x800CCC42   WINSOCK_WSAEPROCLIM 
        0x800CCC43   WINSOCK_WSAEFAULT              Bad address.
        0x800CCC44   WINSOCK_FAILED_WSASTARTUP      Unable to load Windows Sockets.
        0x800CCC45   WINSOCK_WSAEINPROGRESS         Operation now in progress. This error 
                                                    appears if a Windows Sockets API is
                                                    called while a blocking function is in 
                                                    progress.
 
Simple Mail Transport Protocol (SMTP) Errors
--------------------------------------------

        ERROR CODE   ERROR TYPE                     DESCRIPTION
        ----------   ------------------------       ---------------------------------
        0x800CCC60   SMTP_RESPONSE_ERROR            Invalid response.
        0x800CCC61   SMTP_UNKNOWN_RESPONSE_CODE     Unknown error code.
        0x800CCC62   SMTP_500_SYNTAX_ERROR          Syntax error returned.
        0x800CCC63   SMTP_501_PARAM_SYNTAX          Parameter syntax incorrect.
        0x800CCC64   SMTP_502_COMMAND_NOTIMPL       Command not implemented.
        0x800CCC65   SMTP_503_COMMAND_SEQ           Improper command sequence.
        0x800CCC66   SMTP_504_COMMAND_PARAM_NOTIMPL Command not implemented.
        0x800CCC67   SMTP_421_NOT_AVAILABLE         Command not available.
        0x800CCC68   SMTP_450_MAILBOX_BUSY          Mailbox is locked and busy.
        0x800CCC69   SMTP_550_MAILBOX_NOT_FOUND     Mailbox not found.
        0x800CCC6A   SMTP_451_ERROR_PROCESSING      Error processing request.
        0x800CCC6B   SMTP_551_USER_NOT_LOCAL        User mailbox is known, but mailbox 
                                                    not on this server.
        0x800CCC6C   SMTP_452_NO_SYSTEM_STORAGE     No space to store messages.
        0x800CCC6D   SMTP_552_STORAGE_OVERFLOW      Storage limit exceeded.
        0x800CCC6E   SMTP_553_MAILBOX_NAME_SYNTAX   Invalid mailbox name syntax.
        0x800CCC6F   SMTP_554_TRANSACT_FAILED       Transaction failed.
        0x800CCC78   SMTP_REJECTED_SENDER           Unknown sender. This is caused by 
                                                    having the incorrect e-mail address 
                                                    in the Reply-To field.
        0x800CCC79   SMTP_REJECTED_RECIPIENTS       Server rejected recipients.
        0x800CCC7A   SMTP_NO_SENDER                 No sender address specified.
        0x800CCC7B   SMTP_NO_RECIPIENTS             No recipients specified.
  
Post Office Protocol version 3 (POP3) Errors 
-------------------------------------------- 

        ERROR CODE   ERROR TYPE                     DESCRIPTION
        ----------   ------------------------       ------------------------------------
        0x800420CB   POP3_NO_STORE                  Mail cannot be stored on server.
        0x800CCC90   POP3_RESPONSE_ERROR            Client response invalid.
        0x800CCC91   POP3_INVALID_USER_NAME         Invalid user name or user not found.
        0x800CCC92   POP3_INVALID_PASSWORD          Password not valid for account.
        0x800CCC93   POP3_PARSE_FAILURE             Unable to interpret response.
        0x800CCC94   POP3_NEED_STAT                 STAT Command required.
        0x800CCC95   POP3_NO_MESSAGES               No messages on server.
        0x800CCC96   POP3_NO_MARKED_MESSAGES        No messages marked for retrieval.
        0x800CCC97   POP3_POPID_OUT_OF_RANGE        Message ID out of range.

HTTPMail Error
--------------

        ERROR CODE   ERROR TYPE                     DESCRIPTION
        ----------   ------------------------       --------------------------------
        0x800CCC31                                  Bad Request Configuration Bad or 
                                                    malformed request.

Network News Transport Protocol (NNTP) Errors
---------------------------------------------

 
        ERROR CODE   ERROR TYPE                     DESCRIPTION
        ----------   ------------------------       --------------------------------
        0x800CCCA0   NNTP_RESPONSE_ERROR            News server response error.
        0x800CCCA1   NNTP_NEWGROUPS_FAILED          Newsgroup access failed.
        0x800CCCA2   NNTP_LIST_FAILED               LIST command to server failed.
        0x800CCCA3   NNTP_LISTGROUP_FAILED          Unable to display list.
        0x800CCCA4   NNTP_GROUP_FAILED              Unable to open group.
        0x800CCCA5   NNTP_GROUP_NOTFOUND            Group not on server.
        0x800CCCA6   NNTP_ARTICLE_FAILED            Message not on server.
        0x800CCCA7   NNTP_HEAD_FAILED               Message header not found.
        0x800CCCA8   NNTP_BODY_FAILED               Message body not found.
        0x800CCCA9   NNTP_POST_FAILED               Unable to post to server.
        0x800CCCAA   NNTP_NEXT_FAILED               Unable to open next message.
        0x800CCCAB   NNTP_DATE_FAILED               Unable to display date.
        0x800CCCAC   NNTP_HEADERS_FAILED            Unable to display headers.
        0x800CCCAD   NNTP_XHDR_FAILED               Unable to display MIME headers.
        0x800CCCAE   NNTP_INVALID_USERPASS          Invalid user or password.

Remote Access Service (RAS) Errors
----------------------------------

        ERROR CODE   ERROR TYPE                     DESCRIPTION
        ----------   ------------------------       ------------------------------
        0x800CCCC2   RAS_NOT_INSTALLED              RAS/DUN not installed. 
        0x800CCCC3   RAS_PROCS_NOT_FOUND            RAS/DUN process not found. 
        0x800CCCC4   RAS_ERROR                      RAS/DUN error returned. 
        0x800CCCC5   RAS_INVALID_CONNECTOID         Connectoid damaged or missing. 
        0x800CCCC6   RAS_GET_DIAL_PARAMS            Error getting dial settings. 

Internet Message Access Protocol (IMAP) Errors 
----------------------------------------------

        ERROR CODE   ERROR TYPE                     DESCRIPTION
        ----------   ------------------------       -----------------------------
        0x800CCCD1   IMAP_LOGINFAILURE              Login failed.
        0x800CCCD2   IMAP_TAGGED_NO_RESPONSE        Message tagged.
        0x800CCCD3   IMAP_BAD_RESPONSE              Invalid response to request.
        0x800CCCD4   IMAP_SVR_SYNTAXERR             Syntax error.
        0x800CCCD5   IMAP_NOTIMAPSERVER             Not an IMAP server.
        0x800CCCD6   IMAP_BUFFER_OVERFLOW           Buffer limit exceeded.
        0x800CCCD7   IMAP_RECVR_ERROR               Recovery error.
        0x800CCCD8   IMAP_INCOMPLETE_LINE           Incomplete data.
        0x800CCCD9   IMAP_CONNECTION_REFUSED        Connection not allowed.
        0x800CCCDA   IMAP_UNRECOGNIZED_RESP         Unknown response.
        0x800CCCDB   IMAP_CHANGEDUID                User ID has changed.
        0x800CCCDC   IMAP_UIDORDER                  User ID command failed.
        0x800CCCDD   IMAP_UNSOLICITED_BYE           Unexpected disconnect.
        0x800CCCDE   IMAP_IMPROPER_SVRSTATE         Invalid server state.
        0x800CCCDF   IMAP_AUTH_NOT_POSSIBLE         Unable to authorize client.
        0x800CCCE0   IMAP_OUT_OF_AUTH_METHODS       No more authorization types.