Simply mysql quota check

[Alfredo Saldanha]

Hi there,

I'm setting up a new email server with Dovecot(2.2.9) and MySQL.

My Dovecot configuration:

#/etc/dovecot/conf.d/90-quota.conf
service quota-warning {
  executable = script /usr/local/bin/quota-warning.sh
  user = dovecot
  unix_listener quota-warning {
    user = vmail
  }
}

plugin {
  quota = maildir:User quota
  quota_warning = storage=95%% quota-warning 95 %u@%d
  quota_warning2 = storage=80%% quota-warning 80 %u@%d
  args = /etc/dovecot/dovecot-sql.conf.ext
}


#/etc/dovecot/dovecot-sql.conf.ext
password_query = \
  SELECT username AS user, value AS password \
  FROM mailboxes WHERE username = '%n@%d'

user_query = \
  SELECT username, domain, \
  CONCAT('*:storage=', SUBSTRING_INDEX(quota, 'm', 1)*1048576) AS userdb_quota_rule \
  FROM mailboxes, domains WHERE mailboxes.username = '%n@%d' \
  AND domains.domain = '%d'

My idea is when a message is delivered, the dovecot to check quota in the mysql according to the value received in the "user_query" but he does not. 
It shows a value of 2GB that I don't know where it gets. 

I execute a manual query in mysql to know the quota my test user and checked that are 5GB, but when I see the dovecot, it shows 2G.

SELECT username, domain, CONCAT('*:bytes=', SUBSTRING_INDEX(quota, 'm', 1)*1048576) AS userdb_quota_rule 
FROM mailboxes, domains WHERE mailboxes.username = 'junix at domain.com' AND domains.domain = 'domain.com'

+-------------------+----------------+--------------------+
| username          | domain         | userdb_quota_rule  |
+-------------------+----------------+--------------------+
| junix at domain.com  | domain.com     | *:bytes=5242880000 |
+-------------------+----------------+--------------------+

$ sudo doveadm quota get -u junix
Quota name Type    Value   Limit  %
User quota STORAGE    10 2097152  0
User quota MESSAGE     1       -

How would the setting to simply verify the quota of users as userdb_quota_rule this query?

BR,

Alfredo Jr.