when I log into roundcube mail,I can't see any incoming emails in my INBOX, but I can send emails out.
and my imap log file shows below:
[22-Nov-2013 08:28:16 +0100]: [AEE3] S: * OK [CAPABILITY IMAP4 IMAP4rev1 IDLE XAPPLEPUSHSERVICE ID UIDPLUS AUTH=LOGIN NAMESPACE] QQMail IMAP4Server ready
[22-Nov-2013 08:28:16 +0100]: [AEE3] C: A0001 ID ("name" "Roundcube" "version" "1.0-git" "php" "5.4.19" "os" "WINNT" "command" "/webmail/")
[22-Nov-2013 08:28:16 +0100]: [AEE3] S: * ID NIL
[22-Nov-2013 08:28:16 +0100]: [AEE3] S: A0001 OK ID completed
[22-Nov-2013 08:28:16 +0100]: [AEE3] C: A0002 LOGIN castilla1902@qq.com
[22-Nov-2013 08:28:17 +0100]: [AEE3] S: A0002 OK Success login ok
[22-Nov-2013 08:28:17 +0100]: [AEE3] C: A0003 NAMESPACE
[22-Nov-2013 08:28:17 +0100]: [AEE3] S: * NAMESPACE (("" "/")) NIL NIL
[22-Nov-2013 08:28:17 +0100]: [AEE3] S: A0003 OK Success
[22-Nov-2013 08:28:17 +0100]: [AEE3] C: A0004 LOGOUT
[22-Nov-2013 08:28:17 +0100]: [AEE3] S: * BYE LOGOUT received
[22-Nov-2013 08:28:17 +0100]: [AEE3] S: A0004 OK LOGOUT Completed
[22-Nov-2013 08:28:18 +0100]: [522C] S: * OK [CAPABILITY IMAP4 IMAP4rev1 IDLE XAPPLEPUSHSERVICE ID UIDPLUS AUTH=LOGIN NAMESPACE] QQMail IMAP4Server ready
[22-Nov-2013 08:28:18 +0100]: [522C] C: A0001 ID ("name" "Roundcube" "version" "1.0-git" "php" "5.4.19" "os" "WINNT" "command" "/webmail/")
[22-Nov-2013 08:28:18 +0100]: [522C] S: * ID NIL
[22-Nov-2013 08:28:18 +0100]: [522C] S: A0001 OK ID completed
[22-Nov-2013 08:28:18 +0100]: [522C] C: A0002 LOGIN castilla1902@qq.com
[22-Nov-2013 08:28:18 +0100]: [522C] S: A0002 OK Success login ok
[22-Nov-2013 08:28:18 +0100]: [522C] C: A0003 CAPABILITY
[22-Nov-2013 08:28:19 +0100]: [522C] S: * CAPABILITY IMAP4 IMAP4rev1 IDLE XAPPLEPUSHSERVICE NAMESPACE CHILDREN ID UIDPLUS
[22-Nov-2013 08:28:19 +0100]: [522C] S: A0003 OK CAPABILITY Completed
[22-Nov-2013 08:28:19 +0100]: [522C] C: A0004 LSUB "" "*"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LSUB (\HasNoChildren) "/" "INBOX"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LSUB (\NoSelect \HasChildren) "/" "&UXZO1mWHTvZZOQ-"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LSUB (\HasNoChildren) "/" "Sent Messages"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LSUB (\HasNoChildren) "/" "Drafts"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LSUB (\HasNoChildren) "/" "Deleted Messages"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LSUB (\HasNoChildren) "/" "Junk"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LSUB (\HasNoChildren) "/" "&V4NXPpCuTvY-"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LSUB (\HasNoChildren) "/" "INBOX.Sent"
[22-Nov-2013 08:28:19 +0100]: [522C] S: A0004 OK LSUB completed
[22-Nov-2013 08:28:19 +0100]: [522C] C: A0005 LIST "" "*"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LIST (\HasNoChildren) "/" "INBOX"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LIST (\NoSelect \HasChildren) "/" "&UXZO1mWHTvZZOQ-"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LIST (\HasNoChildren) "/" "Sent Messages"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LIST (\HasNoChildren) "/" "Drafts"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LIST (\HasNoChildren) "/" "Deleted Messages"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LIST (\HasNoChildren) "/" "Junk"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LIST (\HasNoChildren) "/" "&V4NXPpCuTvY-"
[22-Nov-2013 08:28:19 +0100]: [522C] S: * LIST (\HasNoChildren) "/" "INBOX.Sent"
[22-Nov-2013 08:28:19 +0100]: [522C] S: A0005 OK LIST completed
[22-Nov-2013 08:28:20 +0100]: [522C] C: A0006 LOGOUT
[22-Nov-2013 08:28:20 +0100]: [522C] S: * BYE LOGOUT received
[22-Nov-2013 08:28:20 +0100]: [522C] S: A0006 OK LOGOUT Completed
[22-Nov-2013 08:28:21 +0100]: [E3E9] S: * OK [CAPABILITY IMAP4 IMAP4rev1 IDLE XAPPLEPUSHSERVICE ID UIDPLUS AUTH=LOGIN NAMESPACE] QQMail IMAP4Server ready
[22-Nov-2013 08:28:21 +0100]: [E3E9] C: A0001 ID ("name" "Roundcube" "version" "1.0-git" "php" "5.4.19" "os" "WINNT" "command" "/webmail/?_task=mail&_action=getunread&_remote=1&_unlock=0&_=1385105300329")
[22-Nov-2013 08:28:21 +0100]: [9C15] S: * OK [CAPABILITY IMAP4 IMAP4rev1 IDLE XAPPLEPUSHSERVICE ID UIDPLUS AUTH=LOGIN NAMESPACE] QQMail IMAP4Server ready
[22-Nov-2013 08:28:21 +0100]: [9C15] C: A0001 ID ("name" "Roundcube" "version" "1.0-git" "php" "5.4.19" "os" "WINNT" "command" "/webmail/?_task=mail&_refresh=1&_mbox=INBOX&_action=list&_remote=1&_unlock=loading1385105300324&_=1385105300327")
[22-Nov-2013 08:28:21 +0100]: [E3E9] S: * ID NIL
[22-Nov-2013 08:28:21 +0100]: [E3E9] S: A0001 OK ID completed
[22-Nov-2013 08:28:21 +0100]: [E3E9] C: A0002 LOGIN castilla1902@qq.com
[22-Nov-2013 08:28:21 +0100]: [9C15] S: * ID NIL
[22-Nov-2013 08:28:21 +0100]: [9C15] S: A0001 OK ID completed
[22-Nov-2013 08:28:21 +0100]: [9C15] C: A0002 LOGIN castilla1902@qq.com
[22-Nov-2013 08:28:21 +0100]: [E3E9] S: A0002 OK Success login ok
[22-Nov-2013 08:28:21 +0100]: [E3E9] C: A0003 LSUB "" "*"
[22-Nov-2013 08:28:21 +0100]: [9C15] S: A0002 OK Success login ok
[22-Nov-2013 08:28:21 +0100]: [9C15] C: A0003 STATUS INBOX (MESSAGES UNSEEN)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LSUB (\HasNoChildren) "/" "INBOX"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LSUB (\NoSelect \HasChildren) "/" "&UXZO1mWHTvZZOQ-"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LSUB (\HasNoChildren) "/" "Sent Messages"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LSUB (\HasNoChildren) "/" "Drafts"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LSUB (\HasNoChildren) "/" "Deleted Messages"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LSUB (\HasNoChildren) "/" "Junk"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LSUB (\HasNoChildren) "/" "&V4NXPpCuTvY-"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LSUB (\HasNoChildren) "/" "INBOX.Sent"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0003 OK LSUB completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] C: A0004 LIST "" "*"
[22-Nov-2013 08:28:22 +0100]: [9C15] S: * STATUS INBOX (MESSAGES 24 UNSEEN 0)
[22-Nov-2013 08:28:22 +0100]: [9C15] S: A0003 OK STATUS completed
[22-Nov-2013 08:28:22 +0100]: [9C15] C: A0004 SELECT INBOX
[22-Nov-2013 08:28:22 +0100]: [9C15] S: * 24 EXISTS
[22-Nov-2013 08:28:22 +0100]: [9C15] S: * 0 RECENT
[22-Nov-2013 08:28:22 +0100]: [9C15] S: * OK [UIDVALIDITY 1375684709] UID validity status
[22-Nov-2013 08:28:22 +0100]: [9C15] S: * OK [UIDNEXT 174] Predicted next UID
[22-Nov-2013 08:28:22 +0100]: [9C15] S: * FLAGS (\Answered \Flagged \Deleted \Draft \Seen)
[22-Nov-2013 08:28:22 +0100]: [9C15] S: * OK [PERMANENTFLAGS (\* \Answered \Flagged \Deleted \Draft \Seen)] Permanent flags
[22-Nov-2013 08:28:22 +0100]: [9C15] S: A0004 OK [READ-WRITE] SELECT complete
[22-Nov-2013 08:28:22 +0100]: [9C15] C: A0005 UID SEARCH 24
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LIST (\HasNoChildren) "/" "INBOX"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LIST (\NoSelect \HasChildren) "/" "&UXZO1mWHTvZZOQ-"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LIST (\HasNoChildren) "/" "Sent Messages"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LIST (\HasNoChildren) "/" "Drafts"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LIST (\HasNoChildren) "/" "Deleted Messages"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LIST (\HasNoChildren) "/" "Junk"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LIST (\HasNoChildren) "/" "&V4NXPpCuTvY-"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * LIST (\HasNoChildren) "/" "INBOX.Sent"
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0004 OK LIST completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] C: A0005 STATUS INBOX (MESSAGES UNSEEN)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * STATUS INBOX (MESSAGES 24 UNSEEN 0)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0005 OK STATUS completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] C: A0006 STATUS Drafts (MESSAGES UNSEEN)
[22-Nov-2013 08:28:22 +0100]: [9C15] S: * SEARCH 173
[22-Nov-2013 08:28:22 +0100]: [9C15] S: A0005 OK UID SEARCH completed
[22-Nov-2013 08:28:22 +0100]: [9C15] C: A0006 UID SEARCH ALL
[22-Nov-2013 08:28:22 +0100]: [9C15] S: * SEARCH
[22-Nov-2013 08:28:22 +0100]: [9C15] S: A0006 OK UID SEARCH completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * STATUS Drafts (MESSAGES 0 UNSEEN 0)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0006 OK STATUS completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] C: A0007 STATUS Junk (MESSAGES UNSEEN)
[22-Nov-2013 08:28:22 +0100]: [9C15] C: A0007 LOGOUT
[22-Nov-2013 08:28:22 +0100]: [9C15] S: * BYE LOGOUT received
[22-Nov-2013 08:28:22 +0100]: [9C15] S: A0007 OK LOGOUT Completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * STATUS Junk (MESSAGES 4 UNSEEN 0)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0007 OK STATUS completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] C: A0008 STATUS "Deleted Messages" (MESSAGES UNSEEN)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * STATUS Deleted Messages (MESSAGES 0 UNSEEN 0)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0008 OK STATUS completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] C: A0009 STATUS INBOX.Sent (MESSAGES UNSEEN)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * STATUS INBOX.Sent (MESSAGES 0 UNSEEN 0)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0009 OK STATUS completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] C: A0010 STATUS "Sent Messages" (MESSAGES UNSEEN)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * STATUS Sent Messages (MESSAGES 4 UNSEEN 0)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0010 OK STATUS completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] C: A0011 STATUS &UXZO1mWHTvZZOQ- (MESSAGES UNSEEN)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * STATUS &UXZO1mWHTvZZOQ- ()
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0011 OK STATUS completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] C: A0012 STATUS &V4NXPpCuTvY- (MESSAGES UNSEEN)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * STATUS &V4NXPpCuTvY- (MESSAGES 4 UNSEEN 0)
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0012 OK STATUS completed
[22-Nov-2013 08:28:22 +0100]: [E3E9] C: A0013 LOGOUT
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: * BYE LOGOUT received
[22-Nov-2013 08:28:22 +0100]: [E3E9] S: A0013 OK LOGOUT Completed
[22-Nov-2013 08:29:08 +0100]: [AC93] S: * OK [CAPABILITY IMAP4 IMAP4rev1 IDLE XAPPLEPUSHSERVICE ID UIDPLUS AUTH=LOGIN NAMESPACE] QQMail IMAP4Server ready
[22-Nov-2013 08:29:08 +0100]: [AC93] C: A0001 ID ("name" "Roundcube" "version" "1.0-git" "php" "5.4.19" "os" "WINNT" "command" "/webmail/?_task=mail&_filter=UNANSWERED&_mbox=INBOX&_action=search&_remote=1&_unlock=loading1385105346832&_=1385105346838")
[22-Nov-2013 08:29:08 +0100]: [AC93] S: * ID NIL
[22-Nov-2013 08:29:08 +0100]: [AC93] S: A0001 OK ID completed
[22-Nov-2013 08:29:08 +0100]: [AC93] C: A0002 LOGIN castilla1902@qq.com
[22-Nov-2013 08:29:08 +0100]: [AC93] S: A0002 OK Success login ok
[22-Nov-2013 08:29:08 +0100]: [AC93] C: A0003 SELECT INBOX
[22-Nov-2013 08:29:08 +0100]: [AC93] S: * 24 EXISTS
[22-Nov-2013 08:29:08 +0100]: [AC93] S: * 0 RECENT
[22-Nov-2013 08:29:08 +0100]: [AC93] S: * OK [UIDVALIDITY 1375684709] UID validity status
[22-Nov-2013 08:29:08 +0100]: [AC93] S: * OK [UIDNEXT 174] Predicted next UID
[22-Nov-2013 08:29:08 +0100]: [AC93] S: * FLAGS (\Answered \Flagged \Deleted \Draft \Seen)
[22-Nov-2013 08:29:08 +0100]: [AC93] S: * OK [PERMANENTFLAGS (\* \Answered \Flagged \Deleted \Draft \Seen)] Permanent flags
[22-Nov-2013 08:29:08 +0100]: [AC93] S: A0003 OK [READ-WRITE] SELECT complete
[22-Nov-2013 08:29:08 +0100]: [AC93] C: A0004 CAPABILITY
[22-Nov-2013 08:29:08 +0100]: [AC93] S: * CAPABILITY IMAP4 IMAP4rev1 IDLE XAPPLEPUSHSERVICE NAMESPACE CHILDREN ID UIDPLUS
[22-Nov-2013 08:29:08 +0100]: [AC93] S: A0004 OK CAPABILITY Completed
[22-Nov-2013 08:29:08 +0100]: [AC93] C: A0005 UID SEARCH UNANSWERED
[22-Nov-2013 08:29:08 +0100]: [AC93] S: * SEARCH 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173
[22-Nov-2013 08:29:08 +0100]: [AC93] S: A0005 OK UID SEARCH completed
Those red words shows that it finds out my messages,but actually no messages are shown in my inbox.
And when i change into 'Unanswered' selection,messages show normally.
I work with QQmail,which is widely used in china.
Can anyone help me?