Hi,

I'm currently facing a strange behaviour of dovecot 1.2.10 (and before): after some days the login into our mail servers stops working for imap-connections. pop3-users can go on with using dovecot. Looking into the logfile I can only find:

[...] imap-login: Disconnected (no auth attempts) imap-login: Disconnected: Shutting down (no auth attempts) [...]

as a hint what is maybe happening. After restarting the system is working quite well again for some time. There is no extra load and not other special at the server running. The authentication is handled over mysql.

This is our dovecot -n output (relevant parts):

# 1.2.10: /usr/local/etc/dovecot.conf # OS: FreeBSD 7.2-STABLE i386 ufs protocols: imaps pop3s pop3 imap ssl_ca_file: /usr/local/etc/ssl/... ssl_cert_file: /usr/local/etc/ssl/... ssl_key_file: /usr/local/etc/ssl/... disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable(default): /usr/local/libexec/dovecot/imap-login login_executable(imap): /usr/local/libexec/dovecot/imap-login login_executable(pop3): /usr/local/libexec/dovecot/pop3-login mail_max_userip_connections(default): 20 mail_max_userip_connections(imap): 20 mail_max_userip_connections(pop3): 10 verbose_proctitle: yes first_valid_gid: 0 mail_access_groups: mail mail_privileged_group: mail mail_location: maildir:/usr/... mail_executable(default): /usr/local/libexec/dovecot/imap mail_executable(imap): /usr/local/libexec/dovecot/imap mail_executable(pop3): /usr/local/libexec/dovecot/pop3 mail_process_size: 512 mail_plugin_dir(default): /usr/local/lib/dovecot/imap mail_plugin_dir(imap): /usr/local/lib/dovecot/imap mail_plugin_dir(pop3): /usr/local/lib/dovecot/pop3 imap_client_workarounds(default): delay-newmail outlook-idle netscape-eoh tb-extra-mailbox-sep imap_client_workarounds(imap): delay-newmail outlook-idle netscape-eoh tb-extra-mailbox-sep imap_client_workarounds(pop3): namespace: type: private prefix: INBOX. inbox: yes list: yes subscriptions: yes

Do you see anything which is unclear or unnecessary and could lead to a crash of the imap-login process after some time?

Thanks for your help!

-- Niels.