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--- start:howto:dovecot_plus_database_quota [2012/01/09 15:13]
aseques [Older documentation (pending to be purged)]
+++ start:howto:dovecot_plus_database_quota [2012/08/23 08:29]
aseques
@@ Line 1: / Line 1: @@
 **__ALERT: This document is currently 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 18: @@
   * 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:
@@ Line 32: / Line 33: @@
 ===== Optional features =====
-==== Sieve filtering ====
+==== Global sieve filtering ====
-Create the sieve script to redirect spam to junk folder
+There is the global script located in /etc/dovecot/sieve/dovecot.sieve, it can be edited to suit your needs with more functionality.
-**/etc/dovecot/sieve/dovecot.sieve**
+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:
-If you have a spam filter such as amavis, it will add the header "X-Spam-Flag = yes", with this little sieve script all this mail will go to Junk folder (can be seen both in webmail or any IMAP client). It's really usefull because all the users can check their own spam without the need of the server admin.
-  mkdir /etc/dovecot/sieve
+<code>require "fileinto";
-  chown -R vmail:mail /etc/dovecot/sieve/
+if exists "X-Spam-Flag" {
-  touch /etc/dovecot/sieve/dovecot.sieve
+	if header :contains "X-Spam-Flag" "YES" {
+       	fileinto "INBOX.Junk";
+	stop;
+	}
+}</code>
-  require "fileinto";
-    if exists "X-Spam-Flag" {
-            if header :contains "X-Spam-Flag" "NO" {
-            } else {
-            fileinto "INBOX.Junk";
-            stop;
-            }
-    }
-Set correct permissions for dovecot.conf (the deliver command will access this file too)
+More info about sieve syntax and usage: http://wiki.dovecot.org/LDA/Sieve
-  chmod 0644 /etc/dovecot/dovecot.conf
+==== Use domain alias/subdomain as a mail alias ====
-==== Use domain alias as mail alias too ====
+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.
-Making a small change in postfix configuration, we can use the domain alias as a mail ailas.
+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).
-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 77: @@
 /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 88: @@
 </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 151: / Line 141: @@
 **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))
-=== Configure Dovecot ===
-If you want the subdomains to be able to receive mail:
-**/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>
-If you want the domains alias to be able to receive mail:
-**/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>

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