[Dovecot] Too many open files

[Antonio Casado Rodríguez]

Hi, other error in "open files":

dovecot: Oct 20 10:52:36 Fatal: 
execv(/usr/local/sbin/post-login-imap-dovecot) failed: Too many open files
dovecot: Oct 20 10:52:36 Error: child 1038 (imap) returned error 84 
(exec() failed)
dovecot: Oct 20 10:55:51 Fatal: 
execv(/usr/local/sbin/post-login-imap-dovecot) failed: Too many open files
dovecot: Oct 20 10:55:51 Error: child 4853 (imap) returned error 84 
(exec() failed)
dovecot: Oct 20 10:55:53 Fatal: 
execv(/usr/local/sbin/post-login-imap-dovecot) failed: Too many open files
dovecot: Oct 20 10:55:53 Error: child 4898 (imap) returned error 84 
(exec() failed)
dovecot: Oct 20 10:55:54 Fatal: 
execv(/usr/local/sbin/post-login-imap-dovecot) failed: Too many open files
dovecot: Oct 20 10:55:54 Error: child 4906 (imap) returned error 84 
(exec() failed)

# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 81919
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 81919
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

We work in "High-performance mode" with
login_max_processes_count = 256

Our script "post-login-imap-dovecot" is:
#!/bin/sh
touch ~/.last_login
exec /usr/libexec/dovecot/imap

Now, we have this:
# lsof -p `cat /var/run/dovecot/master.pid` | wc -l
1018

¿Any idea? Thanks a lot.

Bye.