Mailbox quota reported

Hello,
I noticed that the mail quota reported on ISPconfig is not correct.
For example in these e-mail accounts the total is around 2.5 GB, but when I go directly to /var/vmail/(domain)/ it shows almost 9.4 GB. Why is that? Does it count only the inbox folder and not all the folders like the sent items, thrash items or any other imap folders?


And the real used space:

 

Sorry for the late reply,

I went to check each mailbox for all the folder size and no folder match the value (or even the sum of them) that is shown on ISPconfig. I still have no idea why ISPconfig is looking to give that value
And the folders inside the account:

 

Sure can.
I have a lot of clients so, I attached as a .txt to this post

MOD EDIT: Attachment removed to protect personal data. Relevant content:

Code:

root@web:~# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda3 during installation
UUID=91df1c7c-ebf4-4b13-a4e7-dbf45a0715ed /               ext4    noatime,errors=remount-ro,usrjquota=quota.user,grpjquota=quota.group,jqfmt=vfsv0 0       1
# /boot was on /dev/sda1 during installation
UUID=8b004314-9320-4155-94ed-ef644be4f101 /boot           ext4    noatime         0       2
# swap was on /dev/sda2 during installation
UUID=d65386cf-9e34-4616-ab95-6c2d4d55c304 none            swap    sw              0       0

 

So still no idea what could have been causing this problem? I checked inside the folders, there are only emails in there, no other files that could have been being added to the total size of the folder.

 

I did not. I will post the contents of /etc/dovecot/dovecot.conf below, but first I will tell you that dovecot is reporting the values correctly, only on ISPconfig they don't match,


This is the contents for my /etc/dovecot/dovecot.conf

Code:

listen = *,[::]
protocols = imap pop3 lmtp
auth_mechanisms = plain login
disable_plaintext_auth = no
log_timestamp = "%Y-%m-%d %H:%M:%S "
mail_privileged_group = vmail
ssl_cert = </etc/postfix/smtpd.cert
ssl_key = </etc/postfix/smtpd.key
ssl_dh = </etc/dovecot/dh.pem
ssl_min_protocol = TLSv1.2
ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
ssl_prefer_server_ciphers = no
mail_max_userip_connections = 100
mail_plugins = quota
passdb {
  args = /etc/dovecot/dovecot-sql.conf
  driver = sql
}
userdb {
  driver = prefetch
}
userdb {
  args = /etc/dovecot/dovecot-sql.conf
  driver = sql
}
plugin {
  quota = dict:user::file:/var/vmail/%d/%n/.quotausage

  # no longer needed, as 'sieve' is in userdb extra fields:
  sieve=/var/vmail/%d/%n/.sieve

  sieve_before=/var/vmail/%d/%n/.ispconfig-before.sieve
  sieve_after=/var/vmail/%d/%n/.ispconfig.sieve
  sieve_max_script_size = 2M
  sieve_max_actions = 100
  sieve_max_redirects = 25
}
service auth {
  unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0660
    user = postfix
  }
  unix_listener auth-userdb {
    group = vmail
    mode = 0600
    user = vmail
  }
  user = root
}
service lmtp {
  unix_listener /var/spool/postfix/private/dovecot-lmtp {
   group = postfix
   mode = 0600
   user = postfix
   # For higher volume sites, it may be desirable to increase the number of active listener processes.
   # A range of 5 to 20 is probably good for most sites
#   process_min_avail = 5
  }
}
lmtp_rcpt_check_quota = yes
service imap-login {
  client_limit = 1000
  process_limit = 512
}
protocol imap {
  mail_plugins = quota imap_quota
  auth_verbose = yes
}
protocol pop3 {
  pop3_uidl_format = %08Xu%08Xv
  mail_plugins = quota
  auth_verbose = yes
}
protocol lda {
postmaster_address = [email protected]
  mail_plugins = sieve quota
}
protocol lmtp {
postmaster_address = [email protected]
  mail_plugins = quota sieve
}

service stats {
    unix_listener stats-reader {
        user = vmail
        group = vmail
        mode = 0660
    }

    unix_listener stats-writer {
        user = vmail
        group = vmail
        mode = 0660
    }
}

service quota-status {
  executable = quota-status -p postfix
  unix_listener /var/spool/postfix/private/quota-status {
    group = postfix
    mode = 0660
    user = postfix
  }
  client_limit = 1
}
plugin {
  quota_status_success = DUNNO
  quota_status_nouser = DUNNO
  quota_status_overquota = "552 5.2.2 Mailbox is full"
}

imap_capability=+SEPCIAL-USE XLIST
namespace inbox {
  inbox = yes
  separator = .
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
}