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--- start:howto:dovecot_plus_database_quota [2012/01/09 13:17]
aseques [Adapt postfix master.cf]
+++ start:howto:dovecot_plus_database_quota [2013/06/10 09:22]
aseques [Reasons to use dovecot]
@@ Line 1: / Line 1: @@
-**__ALERT: This is a document being rewritten, only experienced people should use this__**
+===== Dovecot modifications from default imscp install =====
-====== Dovecot modifications from default imscp install ======
 This is an improved version from the original article in ispcp (http://isp-control.net/documentation/howto:mail:replace_courier_with_dovecot)
 All the parts related to the default install where removed since imscp already takes care of that, and it's focused to add the functionality that is available only on dovecot (instead of courier).
+The required dovecot version is now 1.2 (squeeze's default)
 ===== Changes from standard dovecot in imscp =====
-  * Quotas are stored on database so they can be shown from the control panel
+  * Alias and subdomains can be used as a full mail domains
-  * Required dovecot version is now 1.2 (squeeze's default)
+  * Global sieve filtering
-  * Filtering is enabled by default (to archive spam)
 ===== Reasons to use dovecot =====
@@ Line 18: / Line 16: @@
   * You can block users after they are exceeding their quotas.
   * Dovecot is really fast and reliable
+  * Warning users that are overquota
 Please report any bugs/hints/whatever in the following board thread:
 http://forum.i-mscp.net/showthread.php?tid=61
-**NOTE:** There are currently no means to configure the quota for imscp other than fiddling with the database. The functionality from http://www.isp-control.net/forum/thread-8483.html should be imported.
-**NOTE:** If you want to edit the quota directly; it is stored in bytes in the table "mail_users" in a field named "quota".
 ===== Replace Courier with Dovecot =====
@@ Line 32: / Line 26: @@
 ===== Optional features =====
+==== Global sieve filtering ====
+There is the global script located in /etc/dovecot/sieve/dovecot.sieve, it can be edited to suit your needs with more functionality.
+In the default install it moves all the mails tagged as spam to the Junk folder of the mail user, if for some reason you don't have that script created, the content should be this one:
-Create the sieve script to redirect spam to junk folder
+<code>require "fileinto";
-**/etc/dovecot/sieve/dovecot.sieve**
+if exists "X-Spam-Flag" {
-If you have a spam filter such as amavis, it will add the header "X-Spam-Flag = yes", with this little sieve all this mail will go to Junk folder in webmail. Very practical because all the users can check their own spam without the need of the server admin.
+	if header :contains "X-Spam-Flag" "YES" {
+       	fileinto "INBOX.Junk";
+	stop;
+	}
+}</code>
-  mkdir /etc/dovecot/sieve
-  chown -R vmail:mail /etc/dovecot/sieve/
-  touch /etc/dovecot/sieve/dovecot.sieve
-  require "fileinto";
-    if exists "X-Spam-Flag" {
-            if header :contains "X-Spam-Flag" "NO" {
-            } else {
-            fileinto "INBOX.Junk";
-            stop;
-            }
-    }
+More info about sieve syntax and usage: http://wiki.dovecot.org/LDA/Sieve
-Set correct permissions for dovecot.conf (the deliver command accesses this file too)
+==== Use domain alias/subdomain as a mail alias ====
-  chmod 0644 /etc/dovecot/dovecot.conf
+By doing a small change in postfix configuration, we can use the domain alias as a mail ailas.
+Being example2.com an alias of example1.com, whenever we create a mailbox in example1.com the same mailbox in example2.com becomes a redirection.
+So creating [email protected] will also receive the mail from [email protected] automatically. That can be used when a customer don't want the hassle of managing two mail domain (and having to set manually every mail address two times).
-==== Use domain alias as mail alias too ====
-Making a small change in postfix configuration, we can use the domain alias as a mail ailas.
-Being example2.com an alias of example1.com, whenever I create a mailbox in example1.com the same mailbox in example2.com becomes a redirection.
-So creating [email protected] will also receive the mail from [email protected] automatically.
 /etc/postfix/mysql_virtual_domains.cf
 <code>
-user = ispcp_dovecot
+user = DATABASE_USER
-password = PASS_MAILRW
+password = DATABASE_PASSWORD
 hosts = 127.0.0.1
-dbname = ispcp
+dbname = DATABASE_NAME
 query = (SELECT domain_name FROM domain_aliasses
                 INNER JOIN domain  ON domain_aliasses.domain_id=domain.domain_id
@@ Line 83: / Line 70: @@
 /etc/postfix/mysql_virtual_forwards.cf
 <code>
-user = ispcp_dovecot
+user = DATABASE_USER
-password = PASS_MAILRW
+password = DATABASE_PASSWORD
 hosts = 127.0.0.1
-dbname = ispcp
+dbname = DATABASE_NAME
 query =
         SELECT DISTINCT CONCAT(CONCAT(mail_users.mail_acc, "@"), domain.domain_name) from mail_users
@@ Line 94: / Line 81: @@
 </code>
-==== Automatically alert user if his quota exceeds a critical limit ====
+If you want the subdomains to be able to receive mail create this file:
-You can configure Dovecot to execute an external command if an user's quota exceeds a specified limit. In this example the user receives alert emails if his quota exceeds 80% / 95% percent.
+**/etc/dovecot/dovecot-sql-subdomain.conf**
+with the following content:
-Append the following in your plugin section in **/etc/dovecot/dovecot.conf**:
+<code>
+driver = mysql
+connect = host=localhost dbname=imscp user=imscp_dovecot password=PASS_MAILRW
+user_query = SELECT CONCAT('/var/mail/virtual/', subdomain.subdomain_name, ".", domain.domain_name, '/',mail_acc) AS home, '1001' AS uid, '8' AS gid FROM (mail_users INNER JOIN subdomain ON mail_users.sub_id = subdomain.subdomain_id) INNER JOIN domain ON mail_users.domain_id = domain.domain_id WHERE mail_acc='%n' and concat(subdomain.subdomain_name,".",domain.domain_name)='%d';
+</code>
-  quota_warning = storage=95%% /usr/local/bin/dovecot-quota-warning.sh 95
+If you want the domains alias to be able to receive mail:
-  quota_warning2 = storage=80%% /usr/local/bin/dovecot-quota-warning.sh 80
+**/etc/dovecot/dovecot-sql-aliasdomain.conf**
+with the following content:\\
+(In the sql for user_query there are uids and gids 'hardcoded'. The uid must be the uid of vmail user and gid the gid of the mail group. Maybe you have to change the defaults (1001/8))
-If the user's quota reaches the limit the external script dovecot-quota-warning.sh is run. If you define quota warnings make sure that you start with the highest limit because Dovecot only runs the command for the first limit that is exceeded.
-Create **/usr/local/bin/dovecot-quota-warning.sh**
 <code>
-#!/bin/sh
+driver = mysql
-PERCENT=$1
+connect = host=localhost dbname=imscp user=imscp_dovecot password=PASS_MAILRW
-cat << EOF | /usr/lib/dovecot/deliver -d $USER -c /etc/dovecot/dovecot-no-quota-warning.conf
+user_query = SELECT concat('/var/mail/virtual/', domain_aliasses.alias_name, '/',mail_acc) as home, '1001' as uid, '8' as gid FROM (mail_users INNER JOIN domain_aliasses ON mail_users.sub_id = domain_aliasses.alias_id) INNER JOIN domain ON mail_users.domain_id = domain.domain_id WHERE mail_acc='%n' and domain_aliasses.alias_name ='%d';
-From: postmaster@yourdomain.tld
-To: $USER
-Subject: quota warning
-Content-Type: text/plain; charset="UTF-8"
-Attention! The emails in your mailbox are using more than $PERCENT% of your total mail space.
-EOF
 </code>
-Create **/etc/dovecot/dovecot-no-quota-warning.conf** \\
+You have to add in dovecot.conf (section "auth default"):
-This is basically the same file as dovecot.conf but the quota rules are stripped out in order to avoid looping. You can strip the quota lines manually or let it grep do for you:
+  userdb sql {
-  grep -v "quota" dovecot.conf > dovecot-no-quota-warning.conf
+    args = /etc/dovecot/dovecot-sql-subdomain.conf
+  }
-At last set correct permissions to dovecot-no-quota-warning.conf
+  userdb sql {
-  chmod 0644 /etc/dovecot/dovecot-no-quota-warning.conf
+    args = /etc/dovecot/dovecot-sql-aliasdomain.conf
+  }
-For more information about this have a look at http://wiki.dovecot.org/Quota/1.1
 ===== Frequent issues =====
@@ Line 149: / Line 131: @@
     flags=DROhu user=vmail:mail argv=/usr/libexec/dovecot/deliver -f ${sender} -d ${recipient}
-===== Older documentation =====
+===== Older documentation (pending to be purged) =====
-=== 1. Create a new table in ispcp called quota_dovecot ===
-This will create also the database to store quota
-  mysql -u root -p mysql
-  mysql> USE ispcp;
-  mysql> CREATE TABLE quota_dovecot (
-    username varchar(100) not null,
-    bytes bigint not null default 0,
-    messages integer not null default 0,
-    primary key (username)
-    );
-=== 2. Granting permissions to the sql user ===
-  mysql> GRANT SELECT,INSERT,UPDATE ON imscp.quota_dovecot to 'ispcp_dovecot'@'localhost'
-  mysql> FLUSH PRIVILEGES;
-  mysql> QUIT;
-=== 4. Configure Dovecot ===
-Replace /etc/dovecot/dovecot.conf with the following one (you should backup the original because there are a lot of comments in it explaining all the configuration parameters).
-  cp /etc/dovecot/dovecot.conf /etc/dovecot/dovecot.conf.org
-Then save this content as your /etc/dovecot/dovecot.conf
-<code>
-base_dir = /var/run/dovecot/
-protocols = imap pop3
-#Uncomment if using ssl
-#protocols = imap pop3 imaps pop3s
-disable_plaintext_auth = no
-listen=*
-syslog_facility = mail
-login_greeting = Dovecot ready.
-mail_location = maildir:%h
-mail_privileged_group = mail
- #Uncomment these lines to enable dovecot ssl support
- #Dovecot 1.2+ (i.e *BSD ports, lenny backport or squeeze)
- ssl = yes
- #
- #Certificate location
- #ssl_cert_file = /etc/ssl/certs/servername.crt
- #ssl_key_file = /etc/ssl/certs/servername.key
-protocol imap {
-  mail_plugins = quota imap_quota
-}
-#Uncomment to enable debugging
-#mail_debug = yes
-#auth_debug = yes
-#auth_verbose = yes
-namespace private {
- prefix = INBOX.
- inbox = yes
-}
-protocol pop3 {
- pop3_uidl_format = %u-%v
- mail_plugins = quota
-}
-protocol lda {
- postmaster_address = [email protected]
- auth_socket_path = /var/run/dovecot/auth-master
- mail_plugins = quota sieve
-}
-auth default {
- mechanisms = plain login
- passdb checkpassword {
-  args = /var/www/ispcp/engine/ispcp-dovecot-mngr
- }
- userdb sql {
-  args = /etc/dovecot/dovecot-sql-domain.conf
- }
- userdb sql {
-   args = /etc/dovecot/dovecot-sql-aliasdomain.conf
- }
- userdb sql {
-  args = /etc/dovecot/dovecot-sql-subdomain.conf
- }
- socket listen {
-  client {
-   path = /var/spool/postfix/private/auth
-   mode = 0660
-   user = postfix
-   group = postfix
-  }
-  master {
-   path = /var/run/dovecot/auth-master
-   mode = 0660
-   user = vmail
-   group = mail
-  }
- }
- user = root
-}
-#If you don't want to save quota occupation in a database, you should comment this:
-dict {
-  quotadict = mysql:/etc/dovecot/dovecot-dict-sql.conf
-}
-plugin {
-  #Enable sieve for everybody (in dovecot >= 1.2 it is configured here)
-  global_script_path = /etc/dovecot/sieve/dovecot.sieve
-  #Uncomment this if you are using managesieve or per-user rules
-  #sieve = ~/sieve/.dovecot.sieve
-  #sieve_dir = ~/sieve
-  #Enable per-user quota
-  #OPTION A: Using per user maildir files (no database)
-  #quota = maildir:User quota
-  #OPTION B: Using per user database quota (can be read from ispCP)
-  quota = dict:user::proxy::quotadict
-  quota_rule = *:bytes=1G
-}
-</code>
-Create a new file
-**/etc/dovecot/dovecot-sql-domain.conf**
-with the following content: \\
 **NOTE:** In the SQL query for user_query there are uids and gids 'hardcoded'. The uid must be the uid of your vmail user and gid the gid of the mail group. Maybe you have to change the defaults (1001/8))
-  driver = mysql
-  connect = host=localhost dbname=ispcp user=ispcp_dovecot password=PASS_MAILRW
-  user_query = SELECT CONCAT('/var/mail/virtual/', domain.domain_name, '/',mail_acc) AS home, '1001' AS uid, '8' AS gid, CONCAT('maildir:storage=', FLOOR(quota/1024)) AS quota FROM mail_users INNER JOIN domain ON mail_users.domain_id = domain.domain_id WHERE mail_acc='%n' and domain.domain_name='%d' AND (mail_type='normal_mail' OR mail_type='normal_mail,normal_forward');
-  # Use this for Dovecot 1.1+
-  # user_query = SELECT CONCAT('/var/mail/virtual/', domain.domain_name, '/',mail_acc) AS home, '1001' AS uid, '8' AS gid, CONCAT('*:bytes=',quota,'B') AS quota_rule FROM mail_users INNER JOIN domain ON mail_users.domain_id = domain.domain_id WHERE mail_acc='%n' AND domain.domain_name='%d' AND (mail_type='normal_mail' OR mail_type='normal_mail,normal_forward');
-  #Use this if you don't want quota
-  # user_query = SELECT CONCAT('/var/mail/virtual/', domain.domain_name, '/',mail_acc) AS home, '1001' AS uid, '8' AS gid FROM mail_users INNER JOIN domain ON mail_users.domain_id = domain.domain_id WHERE mail_acc='%n' AND domain.domain_name='%d' AND (mail_type='normal_mail' OR mail_type='normal_mail,normal_forward');
-Create a new file
-**/etc/dovecot/dovecot-sql-subdomain.conf**
-with the following content:\\
-(In the sql for user_query there are uids and gids 'hardcoded'. The uid must be the uid of vmail user and gid the gid of the mail group. Maybe you have to change the defaults (1001/8))
-<code>
-driver = mysql
-connect = host=localhost dbname=ispcp user=ispcp_dovecot password=PASS_MAILRW
-user_query = SELECT CONCAT('/var/mail/virtual/', subdomain.subdomain_name, ".", domain.domain_name, '/',mail_acc) AS home, '1001' AS uid, '8' AS gid FROM (mail_users INNER JOIN subdomain ON mail_users.sub_id = subdomain.subdomain_id) INNER JOIN domain ON mail_users.domain_id = domain.domain_id WHERE mail_acc='%n' and concat(subdomain.subdomain_name,".",domain.domain_name)='%d';
-</code>
-Create a new file
-**/etc/dovecot/dovecot-sql-aliasdomain.conf**
-with the following content:\\
-(In the sql for user_query there are uids and gids 'hardcoded'. The uid must be the uid of vmail user and gid the gid of the mail group. Maybe you have to change the defaults (1001/8))
-<code>
-driver = mysql
-connect = host=localhost dbname=ispcp user=ispcp_dovecot password=PASS_MAILRW
-user_query = SELECT concat('/var/mail/virtual/', domain_aliasses.alias_name, '/',mail_acc) as home, '1001' as uid, '8' as gid FROM (mail_users INNER JOIN domain_aliasses ON mail_users.sub_id = domain_aliasses.alias_id) INNER JOIN domain ON mail_users.domain_id = domain.domain_id WHERE mail_acc='%n' and domain_aliasses.alias_name ='%d';
-</code>
-Create the file used to store the quotas on the db
-**/etc/dovecot/dovecot-dict-sql.conf**
-<code># v1.2+ only:
-connect = host=localhost dbname=ispcp user=ispcp_dovecot password=PASS_MAILRW
-map {
-  pattern = priv/quota/storage
-  table = quota_dovecot
-  username_field = username
-  value_field = bytes
-}
-map {
-  pattern = priv/quota/messages
-  table = quota_dovecot
-  username_field = username
-  value_field = messages
-}
-</code>

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