Hello,I searched through the list archives for anything that appeared to be similar to this but I didn't find any good matches. I apologize if this has been brought up before.
Beginning with Dovecot 2.2.34, reported quota usage of a user's inbox can be doubled when the following criteria are met:
1) quota plugin is enabled 2) mailbox_list_index=yes3) A sub-folder of the inbox exists whose name also matches the prefix (for example, "INBOX.Test"), even if that folder has no contents. (Apparently, some mail clients such as K-9 Mail on Android can create these folders automatically)
Downgrading to 2.2.33.2 allows this configuration to work normally. I looked through the changes in git between 2.2.33.2 and 2.2.34 and they appeared extensive, so unfortunately I wasn't able to pinpoint a specific change that caused this.
Reproduced on a CentOS 7 server with Dovecot 2.2.34 built from git sources according to https://wiki2.dovecot.org/CompilingSource#Compiling_Dovecot_From_Git using the following minimal configuration:
========== root@centos7 [~]# dovecot -n # 2.2.34 (874deae): /usr/local/etc/dovecot/dovecot.conf# OS: Linux 3.10.0-862.9.1.el7.x86_64 x86_64 CentOS Linux release 7.5.1804 (Core)
# Hostname: centos7.local
mail_location = maildir:~/Maildir
mail_plugins = quota
mailbox_list_index = yes
namespace inbox {
inbox = yes
location =
prefix = INBOX.
separator = .
}
passdb {
driver = pam
}
plugin {
quota = maildir:Mailbox
}
userdb {
driver = passwd
}
==========
With the system user "myuser" and a minimal Maildir setup containing 1
email in the inbox, and one sub-folder named "INBOX.Test":
========== root@centos7 [~]# ls -lAR /home/myuser/Maildir /home/myuser/Maildir: total 4 drwxr-xr-x. 2 myuser myuser 77 Jul 25 09:36 cur drwxr-xr-x. 5 myuser myuser 56 Jul 25 15:19 .INBOX.Test -rw-r--r--. 1 myuser myuser 14 Jul 25 15:19 maildirsize drwxr-xr-x. 2 myuser myuser 6 Jul 25 09:36 new drwxr-xr-x. 2 myuser myuser 6 Jul 25 09:36 tmp /home/myuser/Maildir/cur: total 12416-rw-r--r--. 1 myuser myuser 12712627 Jul 25 09:07 1532529376.M543965P58007.centos7.local,S=12712627,W=12877782:2,S
/home/myuser/Maildir/.INBOX.Test: total 0 drwxr-xr-x. 2 myuser myuser 6 Jul 25 09:36 cur -rw-r--r--. 1 myuser myuser 0 Jul 25 09:36 maildirfolder drwxr-xr-x. 2 myuser myuser 6 Jul 25 09:36 new drwxr-xr-x. 2 myuser myuser 6 Jul 25 09:36 tmp /home/myuser/Maildir/.INBOX.Test/cur: total 0 /home/myuser/Maildir/.INBOX.Test/new: total 0 /home/myuser/Maildir/.INBOX.Test/tmp: total 0 /home/myuser/Maildir/new: total 0 /home/myuser/Maildir/tmp: total 0 ==========Given this configuration, when "mailbox_list_index" is enabled, after quota recalculation, quota reports that there are 2 messages and that double the amount of storage is used:
==========root@centos7 [~]# doveadm quota recalc -u myuser; doveadm quota get -u myuser Quota name Type Value Limit % Mailbox STORAGE 24830 - 0 Mailbox MESSAGE 2 - 0
==========When "mailbox_list_index" is disabled and quota is recalculated, it will report the message and storage counts correctly:
==========root@centos7 [~]# doveadm -o 'mailbox_list_index=no' quota recalc -u myuser; doveadm quota get -u myuser Quota name Type Value Limit % Mailbox STORAGE 12415 - 0 Mailbox MESSAGE 1 - 0
==========I am hoping that someone with much more familiarity with the code path involved here could take a look at this issue and possibly submit a fix for it -- that would be greatly appreciated. Please let me know if you need any more details regarding the replication steps, though I hope that I didn't miss anything.
Thank you! -- Chris Dillon Technical Analyst III Migrations Specialist cPanel, Inc.
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