[Dovecot] Changed CONTROL= path causes POP3 to fail, whereas IMAP is working (rc25 & rc26)

Wed Mar 7 11:08:46 EET 2007

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Hello,

I'm testing some configurations, in the process I used a wrong user setting
causing POP3 (get new messages) to fail, whereas IMAP was still working.

An easy fix was to remove the entire /var/cache/dovecot/1012/ directory, 
both index and index/control were re-created and do work.
So my guess is that the existance of the indexes causes some trouble when 
just the control information is missing.

Here is what I had done:
The mailbox of "dvtest" was fully working with the correct setting from 
the config file:
mail=maildir:/home/dvtest/MailDir:INDEX=/var/cache/dovecot/1012/index:CONTROL=/var/cache/dovecot/1012/control
(no "/index" in the CONTROL= part).

Then I created a LDAP entry for the user dvtest wrongly:
mail=maildir:/home/dvtestMAIL/MailDir:INDEX=/var/cache/dovecot/1012/index:CONTROL=/var/cache/dovecot/1012/index/control
The CONTROL= ended in "/index/control" rather than just "/control".

(Note: I also mv'ed /home/dvtest to /home/dvtestMAIL in order to see, 
whether the LDAP attribute is getting used.)

Afterwards IMAP is working, but POP3 returns "Couldn't init INBOX:
Unknown error"; Thunderbird displays the error: "The STAT command did not
succeed. Error getting message number and sizes.  Mail server ux-2s11-9
responded: Couldn't sync mailbox."

When I correct the LDAP attribute, hence the CONTROL= path ends in 
"1012/control" again. The mailbox is working with POP3 again.

The INBOX of the erroreous control path does not contain any dovecot-* 
files? The message I deleted and expunged (see logs) were from the INBOX.
/var/cache/dovecot/1012/index/control# lr
.:
total 16
drwx------  4 dvtest Debian-exim 4096 2007-03-07 09:36 ./
drwx------ 12 dvtest dvtest      4096 2007-03-07 09:34 ../
drwx------  2 dvtest Debian-exim 4096 2007-03-07 09:36 .Addresses/
drwx------  2 dvtest Debian-exim 4096 2007-03-07 09:35 .INBOX/

./.Addresses:
total 24
drwx------ 2 dvtest Debian-exim  4096 2007-03-07 09:36 ./
drwx------ 4 dvtest Debian-exim  4096 2007-03-07 09:36 ../
- -rw------- 1 dvtest Debian-exim 12756 2007-03-07 09:36 dovecot-uidlist

./.INBOX:
total 8
drwx------ 2 dvtest Debian-exim 4096 2007-03-07 09:35 ./
drwx------ 4 dvtest Debian-exim 4096 2007-03-07 09:36 ../

The attached file contains the full log of a session POP3 (get new 
messages), IMAP, expunge in INBOX, POP3 again.

I also selected the mailbox Adresses once, to see if it is working.

===

# dovecot --version
1.0.rc26
# dovecot -n
# /usr/local/dovecot.rc26/etc/dovecot.conf
log_path: /var/log/dovecot/dovecot.log
protocols: imap imaps pop3 pop3s
ssl_ca_file: /etc/ssl/certs/ca.crt
ssl_cert_file(default): /etc/ssl/certs/imap.pem
ssl_cert_file(imap): /etc/ssl/certs/imap.pem
ssl_cert_file(pop3): /etc/ssl/certs/pop3.pem
ssl_key_file(default): /etc/ssl/private/imap.key
ssl_key_file(imap): /etc/ssl/private/imap.key
ssl_key_file(pop3): /etc/ssl/private/pop3.key
disable_plaintext_auth: no
verbose_ssl: yes
login_dir: /usr/local/dovecot.rc26/var/run/dovecot/login
login_executable(default): 
/usr/local/dovecot.rc26/libexec/dovecot/imap-login
login_executable(imap): /usr/local/dovecot.rc26/libexec/dovecot/imap-login
login_executable(pop3): /usr/local/dovecot.rc26/libexec/dovecot/pop3-login
login_log_format_elements: %p: user=<%u> method=%m rip=%r lip=%l %c
verbose_proctitle: yes
first_valid_uid: 1000
mail_location: 
maildir:%h/MailDir:CONTROL=/var/cache/dovecot/%i/control:INDEX=/var/cache/dovecot/%i/index
mail_debug: yes
dotlock_use_excl: yes
maildir_copy_with_hardlinks: yes
maildir_copy_preserve_filename: yes
mail_drop_priv_before_exec: yes
mail_executable(default): /usr/local/dovecot.rc26/libexec/dovecot/imap
mail_executable(imap): /usr/local/dovecot.rc26/libexec/dovecot/imap
mail_executable(pop3): /usr/local/dovecot.rc26/libexec/dovecot/pop3
mail_plugins(default): quota imap_quota mail_log zlib
mail_plugins(imap): quota imap_quota mail_log zlib
mail_plugins(pop3): quota mail_log
mail_plugin_dir(default): /usr/local/dovecot.rc26/lib/dovecot/imap
mail_plugin_dir(imap): /usr/local/dovecot.rc26/lib/dovecot/imap
mail_plugin_dir(pop3): /usr/local/dovecot.rc26/lib/dovecot/pop3
mail_log_prefix: %Us(%u) [%p]:
mail_log_max_lines_per_sec: 30
pop3_uidl_format(default):
pop3_uidl_format(imap):
pop3_uidl_format(pop3): %u
pop3_client_workarounds(default):
pop3_client_workarounds(imap):
pop3_client_workarounds(pop3): oe-ns-eoh
namespace:
   type: private
   separator: .
   inbox: yes
   hidden: yes
auth default:
   mechanisms: plain login
   cache_size: 10
   username_chars: 
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890
   verbose: yes
   debug: yes
   debug_passwords: yes
   passdb:
     driver: ldap
     args: /usr/local/dovecot.rc25/etc/dovecot-ldap.conf
   passdb:
     driver: pam
     args: cache_key=%u session=yes dovecot
   userdb:
     driver: prefetch
   userdb:
     driver: ldap
     args: /usr/local/dovecot.rc25/etc/dovecot-ldap.conf
   userdb:
     driver: passwd
   socket:
     type: listen
     client:
       path: /var/run/dovecot/auth-client
       mode: 432
     master:
       path: /var/run/dovecot/auth-master
       mode: 432
       group: mail
plugin:
   quota: fs

Bye,

- -- 
Steffen Kaiser
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