quotas configuration a few questions

16 Oct 2015


      hi everyone
need a few questions answering if possible before i can complete some
modifications on my mailserver
1    how do i modify my user_query line in dovecot-sql.conf for quotas
2     is my iterate_query line ok
3    should i use lmtp or lda to deliver the quota warnings in
quota-warning.sh
my server is using lmtp but i've only seen examples using lda
4    how do i break long lines in dovecot.conf, is it the same as
postgresql
where you leave a space on the next line before continuing the txt.
i would like to break the cipher line in dovecot.conf over multiple
lines
5    have i configured my namespace section correctly
so that i can substitute for the autocreate plugin
also could you give the files a quick look over to make sure
there isn't  any unnecessary additions that shouldn't be there or

omissions that should be there
thanks shadrock
============    /etc/dovecot/dovecot.conf
disable_plaintext_auth = no
mail_privileged_group = vmail
log_timestamp = "%Y-%m-%d %H:%M:%S "
log_path = /var/log/dovecot.log
auth_debug_passwords=yes
mail_debug=yes
verbose_ssl=yes
ssl_prefer_server_ciphers = yes
ssl_dh_parameters_length = 2048
ssl_cert = </etc/ssl/certs/postfix.crt
ssl_key = </etc/ssl/private/postfix.key
ssl_ca = </etc/ssl/ca.crt
ssl_protocols = !SSLv2 !SSLv3
ssl_cipher_list =
ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:
auth_mechanisms = plain login
passdb {
args = /etc/dovecot/dovecot-sql.conf
driver = sql
}
userdb {
driver = prefetch
}
userdb {
args = /etc/dovecot/dovecot-sql.conf
driver = sql
}
#namespace inbox {
# separator = /
#  type = private
#  inbox = yes
# location = maildir:/home/mailboxes/Maildir
# list = yes
# prefix = INBOX.
#mailbox Drafts {
#  auto = subscribe
#  special_use = \Drafts
#}
#mailbox Junk {
#  auto = subscribe
#  special_use = \Junk
#}
#mailbox Sent {
#  auto = subscribe
#  special_use = \Sent
#}
#mailbox Trash {
#  auto = subscribe
#  special_use = \Trash
#}
#}
mail_plugins = quota
# protocols = "pop3 imap lmtp"
protocols = pop3 imap lmtp sieve
plugin {
autocreate = Trash
autocreate2 = Sent
autosubscribe = Trash
autosubscribe2 = Sent
sieve = ~/.dovecot.sieve
sieve_global_path = /etc/dovecot/sieve/default.sieve
sieve_dir = ~/sieve
sieve_global_dir = /etc/dovecot/sieve/global/
quota = dict:User quota::proxy::quotadict
quota_rule2 = Trash:storage=+10%%
quota_warning = storage=100%% quota-warning +100 %u
quota_warning2 = storage=95%% quota-warning +95 %u
quota_warning3 = storage=80%% quota-warning +80 %u
quota_warning4 = -storage=100%% quota-warning -100 %u # user is
no longer over quota
}
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0660
user = postfix
}
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0600
user = postfix
}
}
service managesieve-login {
inet_listener sieve {
port = 4190
}
}
service managesieve {
}
service dict {
unix_listener dict {
group = vmail
mode = 0660
user = vmail
}
user = root
}
service quota-warning {
executable = script /usr/local/bin/quota-warning.sh
user = vmail
unix_listener quota-warning {
group = vmail
mode = 0660
user = vmail
}
}
protocol imap {
mail_plugins = $mail_plugins autocreate imap_quota
}
protocol sieve {
managesieve_max_line_length = 65536
managesieve_implementation_string = dovecot
log_path = /var/log/dovecot-sieve-errors.log
info_log_path = /var/log/dovecot-sieve.log
}
protocol lmtp {
postmaster_address=postmaster@thisdomain.co.uk
hostname=testy.thisdomain.co.uk
mail_plugins = $mail_plugins sieve quota
info_log_path = /var/log/dovecot-lmtp.log
}
dict {
quotadict = pgsql:/etc/dovecot/dovecot-dict-sql.conf
}
protocol pop3 {
mail_plugins = quota
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
pop3_uidl_format = %08Xu%08Xv
}
--(postgresql stuff)--
CREATE DATABASE mail WITH OWNER mailreader;
CREATE TABLE aliases (
alias text NOT NULL,
email text NOT NULL
);
CREATE TABLE users (
email text NOT NULL,
password text NOT NULL,
maildir text NOT NULL,
created timestamp with time zone DEFAULT now()
);
CREATE TABLE vdomain (
domain text NOT NULL
);
CREATE TABLE quota (
username varchar(100) not null,
bytes bigint not null default 0,
messages integer not null default 0,
primary key (username)
);
CREATE OR REPLACE FUNCTION merge_quota() RETURNS TRIGGER AS $$
BEGIN
IF NEW.messages < 0 OR NEW.messages IS NULL THEN
-- ugly kludge: we came here from this function, really do try to insert
IF NEW.messages IS NULL THEN
NEW.messages = 0;
ELSE
NEW.messages = -NEW.messages;
END IF;
return NEW;
END IF;
LOOP
UPDATE quota SET bytes = bytes + NEW.bytes,
messages = messages + NEW.messages
WHERE username = NEW.username;
IF found THEN
RETURN NULL;
END IF;
BEGIN
  IF NEW.messages = 0 THEN
    INSERT INTO quota (bytes, messages, username)
      VALUES (NEW.bytes, NULL, NEW.username);
  ELSE
    INSERT INTO quota (bytes, messages, username)
      VALUES (NEW.bytes, -NEW.messages, NEW.username);
  END IF;
  return NULL;
EXCEPTION WHEN unique_violation THEN
  -- someone just inserted the record, update it
END;
END LOOP;
END;
$$ LANGUAGE plpgsql;
DROP TRIGGER IF EXISTS mergequota ON quota;
CREATE TRIGGER mergequota BEFORE INSERT ON quota
FOR EACH ROW EXECUTE PROCEDURE merge_quota();
--(postgresql stuff)--
============    /etc/dovecot/dovecot-dict-sql.conf
connect = host=/run/postgresql dbname=mail user=mailreader
map {
pattern = priv/quota/storage
table = quota2
username_field = username
value_field = bytes
}
map {
pattern = priv/quota/messages
table = quota2
username_field = username
value_field = messages
}
============    /etc/dovecot/dovecot-sql.conf
driver = pgsql
connect = host=/run/postgresql dbname=mail user=mailreader
default_pass_scheme = SHA512
password_query = SELECT email as user, password FROM users WHERE email =
'%u'
user_query = SELECT email as user,
'maildir:/home/mailboxes/maildir/'||maildir as mail,
'/home/mailboxes/maildir/'||maildir as home, 500 as uid, 500 as gid FROM
users WHERE email = '%u'
iterate_query = SELECT email AS user FROM users
============    /usr/local/bin/quota-warning.sh
#!/bin/sh
BOUNDARY="$1"
USER="$2"
MSG=""
if [[ "$BOUNDARY" = "+100" ]]; then
MSG="Your mailbox is now overfull (>100%). In order for your account
to continue functioning properly, you need to remove some emails NOW."
elif [[ "$BOUNDARY" = "+95" ]]; then
MSG="Your mailbox is now over 95% full. Please remove some emails ASAP."
elif [[ "$BOUNDARY" = "+80" ]]; then
MSG="Your mailbox is now over 80% full. Please consider removing
some emails to save space."
elif [[ "$BOUNDARY" = "-100" ]]; then
MSG="Your mailbox is now back to normal (<100%)."
fi
cat << EOF | /usr/lib/dovecot/lmtp -d $USER -o
"plugin/quota=maildir:User quota:noenforcing"
From: postmaster@yourdomain.com
Subject: Email Account Quota Warning
Dear User,
$MSG
Best regards,
Your Mail System
EOF

niya levi

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