==== Required information ====
- iRedMail version: 0.8.3
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Linux/BSD distribution name and version: Debian 6 Squeeze 2.6.32.17
- Related log if you're reporting an issue: dovecot.log
====
When the number of connected sessions 100-130 in dovecot.log appear lines like this:
Mar 14 11:27:26 IMAP(abc@chemical.ru): Warning: read(/var/run/dovecot/dict-server): dict lookup took 12 seconds
Mar 14 11:27:52 IMAP(cba@chemical.ru): Error: read(/var/run/dovecot/dict-server) failed: Timeout after 30 seconds
Mar 14 11:27:52 IMAP(cba@chemical.ru): Error: Internal quota calculation error
... and e-mail clients can not login.
Server load is low.
Please help to solve this problem.