dovecot - Mar 2019 - Dovecot quota and Postfix smtpd_recipient_restrictions?

Hi Friends,

a doubt:

I would like to enable (the same) quota (count) for all (virtual)users,
on Debian Stretch, Postfix 3.1.8, Dovecot 2.2.27,
and is not clear for me if I need to tell Postfix to communicate with 
the service in /etc/postfix/main.cf as here:


smtpd_recipient_restrictions      ...
     check_policy_service inet:mailstore.example.com:12340



My current Postfix "smtpd_recipient_restrictions":


-o 
smtpd_recipient_restrictions=reject_non_fqdn_recipient,reject_unknown_recipient_domain,permit_sasl_authenticated,reject



Currently I've edited:



conf.d/10-mail.conf:

# Space separated list of plugins to load for all services. Plugins 
specific to
# IMAP, LDA, etc. are added to this list in their own .conf files.
mail_plugins = $mail_plugins quota


conf.d/20-imap.conf:

protocol imap {
   # Space separated list of plugins to load (default is global 
mail_plugins).
   mail_plugins = $mail_plugins imap_quota
}


conf.d/90-quota.conf: (for use with the quota-status service)

plugin {
     quota_grace = 10%%
     # 10% is the default
     quota_status_success = DUNNO
     quota_status_nouser = DUNNO
     quota_status_overquota = "552 5.2.2 Mailbox is full"
}



/etc/dovecot/conf.d/90-quota.conf:

plugin {
quota = maildir
quota_rule = *:storage=3G
quota_rule2 = Trash:storage=+100M
   # LDA/LMTP allows saving the last mail to bring user from under quota 
to
   # over quota, if the quota doesn't grow too high. Default is to allow 
as
   # long as quota will stay under 10% above the limit. Also allowed e.g. 
10M.
   #quota_grace = 10%%
   # 10% is the default
   quota_status_success = DUNNO
   quota_status_nouser = DUNNO
   quota_status_overquota = "552 5.2.2 Mailbox is full"
}
plugin {
   quota_warning = storage=95%% quota-warning 95 %u
   quota_warning2 = storage=80%% quota-warning 80 %u
}
plugin {
   #quota = dirsize:User quota
   #quota = maildir:User quota
   #quota = dict:User quota::proxy::quota
   #quota = fs:User quota
quota = count:User quota
   # This is required - it uses "virtual sizes" rather than
"physical
sizes" for quota counting:
   quota_vsizes = yes
}
plugin {
   #quota = dict:user::proxy::quota
   #quota2 = dict:domain:%d:proxy::quota_domain
   #quota_rule = *:storage=102400
   #quota2_rule = *:storage=1048576
}
service quota-warning {
   executable = script /usr/local/bin/quota-warning.sh
   user = dovecot
   unix_listener quota-warning {
     user = vmail
   }
}
service quota-status {
     executable = quota-status -p postfix
     inet_listener {
         port = 12340
         # You can choose any port you want
     }
     client_limit = 1
}



Many many thanks!!


Davide

Hi,
> I would like to enable (the same) quota (count) for all (virtual)users,
> on Debian Stretch, Postfix 3.1.8, Dovecot 2.2.27,
> and is not clear for me if I need to tell Postfix to communicate with the
service in /etc/postfix/main.cf as here:
> 
> 
> smtpd_recipient_restrictions >  ??? ...
>  ??? check_policy_service inet:mailstore.example.com:12340
I configured it like your example above and it works for me.

Best
Urban

On 3/19/19 6:00 PM, Davide Marchi via dovecot wrote:
> [...] is not clear for me if I need to tell Postfix to communicate 
> with the service in /etc/postfix/main.cf as here:
>
>
> smtpd_recipient_restrictions > ??? ...
> ??? check_policy_service inet:mailstore.example.com:12340
>
> Davide
Hey Davide,

You don't *have* to, but you can. Now whether you should or shouldn't is
up to you. The downside of enabling this is that if John is over quota, 
then if you try to send a mail to three recipients John, Mary and 
Socrates postfix will refuse to relay mail for any of them, even if only 
John is over quota. This has confused my users who couldn't understand 
why things were like this, but apparently this is how postfix is 
designed to work ? (or is it a protocol limitation ?)

I don't know if other people here can testify of this or have they found 
a way to circumvent this ? (or more likely is it simply a bad 
configuration on my part ^:^' ?)

Yassine.