exim и Too many open files in system

Начали валится такие вещи из exim'а:

2007-10-02 21:00:33 1Icl6I-0003fO-Dy spool file open error while delivering: Too many open files in system
2007-10-02 21:00:34 Exim configuration error in line 319 of /usr/local/etc/exim/configure:
  group mail was not found
2007-10-02 21:00:34 1Icl68-0003XS-Tz Process 15093 (parent 1) failed to create child process to send failure message: Too many open files in system
2007-10-02 21:00:37 1Icl6B-0003a0-9R re-exec of exim (/usr/local/sbin/exim) with -t failed: Too many open files in system
2007-10-02 21:18:06 1IclMI-0000Lu-ET spool file directory open error while delivering: Too many open files in system
2007-10-02 21:44:07 1Iclmg-0005QQ-Gr re-exec of exim (/usr/local/sbin/exim) with -Mc failed: Too many open files in system
2007-10-02 22:00:01 Exim configuration error in line 319 of /usr/local/etc/exim/configure:
  group mail was not found
2007-10-02 22:34:16 1IcmZF-0003kw-Ew re-exec of exim (/usr/local/sbin/exim) with -t failed: Too many open files in system
2007-10-02 22:55:51 1Icmtf-0003lI-Ns spool file directory open error while delivering: Too many open files in system
2007-10-02 23:02:56 1Icn12-0001P1-PO re-exec of exim (/usr/local/sbin/exim) with -t failed: Too many open files in system

погуглив изменил параметры:
echo "16000" > /proc/sys/fs/file-max
ulimit -n 8192

а так же на всякий пожарный:
# cat /etc/security/limits.conf
mailman         hard    nofile          8192
mailman         soft    nofile          8192
root            hard    nofile          8192
root            soft    nofile          8192

Кто нибудь может подсказать, этого достаточно что бы избавиться от проблемы?!

Заранее спасибо!!!