cyrus+postfix error \group ID 12

[Goldcoast POP3 server]

Hello thsi is in response postfix + cyrus errors. How do we make both postfix and cyrus members of the mail group. We have changed the permissions to have both cyrus and postfix as owner and group accordingly. But still an error is recorded as follows: Jun 19 19:45:56 mail postfix/qmgr[936]: 14C89DF8: from=<>, size=2756, nrcpt=1 (queue active) Jun 19 19:45:56 mail postfix/qmgr[936]: 80C2DDFC: from=<[EMAIL PROTECTED]>, size=678, nrcpt=1 (queue active) Jun 19 19:45:57 mail postfix/pipe[1473]: fatal: request to use mail system owner group id 12 Jun 19 19:45:57 mail postfix/pipe[1474]: fatal: request to use mail system owner group id 12 Jun 19 19:45:58 mail postfix/local[1470]: warning: end of input while receiving string data from service private/cyrus Jun 19 19:45:58 mail postfix/local[1470]: warning: private/cyrus: malformed response Jun 19 19:45:58 mail postfix/master[926]: warning: process /usr/libexec/postfix/pipe pid 1473 exit status 1 Jun 19 19:45:58 mail postfix/master[926]: warning: /usr/libexec/postfix/pipe: bad command startup -- throttling Jun 19 19:45:58 mail postfix/master[926]: warning: process /usr/libexec/postfix/pipe pid 1474 exit status 1 Jun 19 19:45:58 mail postfix/local[1471]: warning: end of input while receiving string data from service private/cyrus Jun 19 19:45:58 mail postfix/local[1471]: warning: private/cyrus: malformed response