cyrus/postix malformed response error

[Goldcoast POP3 server]

Hello I'm receiving the following error in our /var/log/messages file. We are running Cyrus and postfix as our mail server and delivery system on RH 7.1 Also Netscape clients cannot retrieve their mail or it doesn't allow them to login? any suggestion welcome!. The error log shows as follows.   <!--StartFragment-->Jun 29 14:45:56 mail postfix/qmgr[936]: F3411DF2: from=<>, size=2129, nrcpt=1 (queue active) Jun 29 14:45:56 mail postfix/qmgr[936]: A7D2DDFB: from=<[EMAIL PROTECTED]>, size=678, nrcpt=1 (queue active) Jun 29 14:45:56 mail postfix/qmgr[936]: 6808998C: from=<>, size=2129, nrcpt=1 (queue active) Jun 29 14:45:56 mail postfix/pipe[21898]: fatal: request to use mail system owner group id 12 Jun 29 14:45:56 mail postfix/pipe[21899]: fatal: request to use mail system owner group id 12 Jun 29 14:45:57 mail postfix/local[21895]: warning: end of input while receiving string data from service private/cyrus Jun 29 14:45:57 mail postfix/local[21895]: warning: private/cyrus: malformed response Jun 29 14:45:57 mail postfix/master[926]: warning: process /usr/libexec/postfix/pipe pid 21898 exit status 1 Jun 29 14:45:57 mail postfix/master[926]: warning: /usr/libexec/postfix/pipe: bad command startup -- throttling Jun 29 14:45:57 mail postfix/master[926]: warning: process /usr/libexec/postfix/pipe pid 21899 exit status 1 Jun 29 14:45:57 mail postfix/local[21896]: warning: end of input while receiving string data from service private/cyrus Jun 29 14:45:57 mail postfix/local[21896]: warning: private/cyrus: malformed response Jun 29 14:46:57 mail postfix/pipe[21900]: fatal: request to use mail system owner group id 12 Jun 29 14:46:58 mail postfix/master[926]: warning: process /usr/libexec/postfix/pipe pid 21900 exit status 1 Jun 29 14:46:58 mail postfix/master[926]: warning: /usr/libexec/postfix/pipe: bad command startup -- throttling Jun 29 14:46:58 mail postfix/local[21895]: warning: end of input while receiving string data from service private/cyrus Jun 29 14:46:58 mail postfix/local[21895]: warning: private/cyrus: malformed response   thank you in advance.