Hallo,

since a few days, users sometimes have problems connecting to our mailserver, in the mail.err are many lines like this:

Apr 23 11:14:25 psy2 dovecot: dovecot: child 17607 (login) killed with signal 11 (core dumps disabled) (ip=xx.xx.146.84)

Users who are already logged in keep connected, but new connections are not possible.This happens only between 10 am and 3 pm, never in the early morning or at night, so i assume, maybe this is caused by too many simultaneous connections?

After restarting dovecot the problem is temporary solved, new users may connect, but after one or a few days, this may happen again.

1.2.15: /etc/dovecot/dovecot.conf

OS: Linux 2.6.32-5-amd64 x86_64 Debian 6.0.1

log_timestamp: %Y-%m-%d %H:%M:%S protocols: imap imaps pop3 pop3s disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable(default): /usr/lib/dovecot/imap-login login_executable(imap): /usr/lib/dovecot/imap-login login_executable(pop3): /usr/lib/dovecot/pop3-login mail_privileged_group: alle mail_location: maildir:~/Maildir fsync_disable: yes mbox_write_locks: fcntl dotlock mail_executable(default): /usr/lib/dovecot/imap mail_executable(imap): /usr/lib/dovecot/imap mail_executable(pop3): /usr/lib/dovecot/pop3 mail_plugin_dir(default): /usr/lib/dovecot/modules/imap mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap mail_plugin_dir(pop3): /usr/lib/dovecot/modules/pop3 auth default: passdb: driver: pam args: dovecot userdb: driver: passwd

May anybody help? Thanks in advance!

Greetings from Frank.