Outlook Express Error Codes 

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  
0x800CCC09 CONN_RECV  
0x800CCC0A INCOMPLETE Message download incomplete.
0x800CCC0B BUSY Server or maildrop is busy.
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 SSL.
0x800CCC40 WINSOCK_WSASYSNOTREADY Network subsystem is unusable.
0x800CCC41 WINSOCK_WSAVERNOTSUPPORTED Windows Sockets cannot support this application.
0x800CCC43 WINSOCK_WSAEFAULT Bad address.
0x800CCC44 WINSOCK_FAILED_WSASTARTUP Unable to load Windows Sockets.
0x800CCC45 WINSOCK_WSAEINPROGRESS Operation now in progress. 
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 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. 
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.
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. 
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
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.
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.
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.