[Dovecot] dovecot - outlook users keep getting locked out of imap
Greetings:
My outlook users accessing mail via dovecot's imaps have been consistantly
getting locked out of their email. It happens about once a week per
outlook user. It appears to happen when the are cliking on emails with
attachments. When this happens, there are two imap deamons running for
that user. I kill both deamons and things start working again.
Squirrelmail, thunderbird and pine users haven't had this issue. I'm
running a version of dovecot dated dovecot-stable-20050610.
All user accounts have their mail on nfs mount points. The INBOX directory is local to the imap server but we have a smtp server that gets this data via nfs. Below is the dovecot.conf info:
base_dir = /var/run/dovecot/
protocols = imap imaps
ssl_disable = no
ssl_cert_file = /usr/local/imaps/certs/dovecot_cert.pem
ssl_key_file = /usr/local/imaps/certs/dovecot_key.pem
disable_plaintext_auth = yes
login_dir = /var/run/dovecot/login
login_process_size = 128
login_processes_count = 9
login_max_processes_count = 256
login_max_logging_users = 512
verbose_proctitle = yes
mail_extra_groups = mail
default_mail_env = mbox:~/mail/:INBOX=/var/spool/mail/%u
mmap_disable = no
lock_method = fcntl
mbox_read_locks = fcntl
mbox_write_locks = dotlock fcntl
mbox_lock_timeout = 300
mbox_dotlock_change_timeout = 30
mbox_dirty_syncs = yes
mbox_very_dirty_syncs = no
protocol imap {
imap_client_workarounds = outlook-idle
}
protocol pop3 {
}
auth default {
mechanisms = plain
passdb = pam
userdb = passwd
user = root
}
Your assistance is greatly appreciated.
Thanks, Anthony
On 28.6.2005, at 22:29, Anthony Kolasny wrote:
My outlook users accessing mail via dovecot's imaps have been consistantly getting locked out of their email. It happens about once a week per outlook user. It appears to happen when the are cliking on emails with attachments. When this happens, there are two imap deamons running for that user. I kill both deamons and things start working again.
Could you check with strace/ktrace/whatever what the processes are doing? Are they holding any file locks?
Squirrelmail, thunderbird and pine users haven't had this issue. I'm running a version of dovecot dated dovecot-stable-20050610.
Possibly because Outlook opens multiple connections to same mailbox.
All user accounts have their mail on nfs mount points. The INBOX directory is local to the imap server but we have a smtp server that gets this data via nfs. Below is the dovecot.conf info:
..
default_mail_env = mbox:~/mail/:INBOX=/var/spool/mail/%u
So you're keeping Dovecot's indexes in NFS? There are some problems with it. Are you using only computer as IMAP server or are there multiple? Storing the indexes locally might be a good idea if the users normally get logged into same server:
default_mail_env = mbox:~/mail/:INBOX=/var/spool/mail/%u:INDEX=/var/indexes/%u
mmap_disable = no
If indexes are stored in NFS and multiple computers are accessing the same mailbox, this must be set to yes. Probably should be set to yes in any case with NFS.
lock_method = fcntl
mbox_read_locks = fcntl mbox_write_locks = dotlock fcntl
And lockd is working fine? I've heard it has always had problems.. Dovecot wouldn't mind if you set all of these to just dotlock.
participants (2)
-
Anthony Kolasny
-
Timo Sirainen