diff --git a/README.md b/README.md
index e895bd3f..34c3cc2c 100644
--- a/README.md
+++ b/README.md
@@ -739,3 +739,303 @@ Documents contributed by iRedMail users:
 # Frequently Asked Questions
 * [Locations of configuration and log files of mojor components](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/file.locations.md)
 * [Why append timestamp in maildir path](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/why.append.timestamp.in.maildir.path.md)
+# Install iRedMail
+* [Install iRedMail on Red Hat Enterprise Linux, CentOS](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/0-install.iredmail.on.rhel.md)
+* [Install iRedMail on Debian or Ubuntu Linux](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/1-install.iredmail.on.debian.ubuntu.md)
+* [Install iRedMail on FreeBSD (without Jail)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/2-install.iredmail.on.freebsd.md)
+* [Install iRedMail on OpenBSD](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/3-install.iredmail.on.openbsd.md)
+* [Setup DNS records for your iRedMail server](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/setup_dns.md)
+* [Perform silent/unattended iRedMail installation](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/unattended.iredmail.installation.md)
+# Configure mail client applications
+* [Configure Thunderbird as mail client (POP3/IMAP, SMTP and global ldap address book)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/mua/configure.thunderbird.md)
+# How to
+* [Allow certain users to send email as another user](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-allow.certain.users.to.send.email.as.different.user.md)
+* [Change mail attachment size](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-change.mail.attachment.size.md)
+* [Completely disable Amavisd + ClamAV + SpamAssassin](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-completely.disable.amavisd.clamav.spamassassin.md)
+* [Enable SMTPS service (SMTP over SSL, port 465)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-enable.smtps.md)
+* [Disable spam virus scanning for outgoing mails](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-disable.spam.virus.scanning.for.outgoing.mails.md)
+* [Amavisd + SpamAssassin not working, no mail header (X-Spam-*) inserted.](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-no.x-spam.headers.md)
+* [Quarantining](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-quarantining.md)
+* [Sign DKIM signature on outgoing emails for new mail domain](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-sign.dkim.signature.for.new.domain.md)
+* [Allow insecure POP3/IMAP/SMTP connections without STARTTLS](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/2-allow.insecure.pop3.imap.smtp.connections.md)
+* [Allow user to send email without authentication](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/allow.user.to.send.email.without.authentication.md)
+* [Force mail user to change password in 90 days](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/force.user.to.change.password.md)
+* [Ignore Trash folder in mailbox quota](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ignore.trash.folder.in.quota.md)
+* [LDAP: Add an alias domain](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.alias.domain.md)
+* [LDAP: Add a mail alias account](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.mail.alias.md)
+* [LDAP: Add a mail list account](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.mail.list.md)
+* [LDAP: User mail forwarding.](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.user.mail.forwarding.md)
+* [Monitor incoming and outgoing mails with BCC](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/monitor.incoming.and.outgoing.mails.with.bcc.md)
+* [Pipe incoming email for certain user to external script ](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/pipe.incoming.email.for.certain.user.to.external.script.md)
+* [Force Dovecot to recalculate mailbox quota](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/recalculate.mailbox.quota.md)
+* [SQL: Create an mail alias account with SQL command line](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/sql.create.mail.alias.md)
+* [Store SpamAssassin bayes in SQL](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/store.spamassassin.bayes.in.sql.md)
+
+Documents contributed by iRedMail users:
+
+* [Anti-spam with Dovecot antispam plugin and SpamAssassin](http://www.iredmail.org/forum/topic8169-iredmail-support-antispam-via-dovecot-and-spamassassin.html), contributed by Dexus.
+# Third-party integrations
+* [Integrate Microsoft Active Directory in iRedMail](https://bitbucket.org/zhb/docs.iredmail.org/src/default/integrations/active.directory.md)
+* [SOGo: install SOGo on CentOS 6 with iRedMail (MySQL backend)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/integrations/sogo-centos-6-mysql.md)
+
+Documents contributed by iRedMail users:
+
+* [Enabling Apache Solr 4.10 (using jetty) with Dovecot 2.2 for fulltext search results on Centos 6 (iRedMail compatible)](https://extremeshok.com/6622/enabling-apache-solr-4-10-using-jetty-with-dovecot-2-2-for-fulltext-search-results-on-centos-6-iredmail-compatible/)
+# Cluster
+
+Documents contributed by iRedMail users:
+
+* [An Ultra-HA, full Mult-Master E-mail cluster with iRedMail, MariaDB, and IPVS](http://pastebin.com/JcYeQBrX), contributed by Joshua Boniface.
+# Migrations
+* [Migrate iRedAdmin open source edition to iRedAdmin-Pro](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/migrate.or.upgrade.iredadmin.md)
+* [Migrate old iRedMail server to the latest stable release](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/migrate.to.new.iredmail.server.md)
+* [Password hashes](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/password.hashes.md)
+# Troubleshooting and Debug
+* [Turn on debug mode in Amavisd and SpamAssassin](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.amavisd.md)
+* [Turn on debug mode in Cluebringer](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.cluebringer.md)
+* [Turn on debug mode in Dovecot](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.dovecot.md)
+* [Turn on debug mode in iRedAPD](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.iredapd.md)
+* [Turn on debug mode in OpenLDAP](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.openldap.md)
+# Frequently Asked Questions
+* [Locations of configuration and log files of mojor components](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/file.locations.md)
+* [Why append timestamp in maildir path](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/why.append.timestamp.in.maildir.path.md)
+# Install iRedMail
+* [Install iRedMail on Red Hat Enterprise Linux, CentOS](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/0-install.iredmail.on.rhel.md)
+* [Install iRedMail on Debian or Ubuntu Linux](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/1-install.iredmail.on.debian.ubuntu.md)
+* [Install iRedMail on FreeBSD (without Jail)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/2-install.iredmail.on.freebsd.md)
+* [Install iRedMail on OpenBSD](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/3-install.iredmail.on.openbsd.md)
+* [Setup DNS records for your iRedMail server](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/setup_dns.md)
+* [Perform silent/unattended iRedMail installation](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/unattended.iredmail.installation.md)
+# Configure mail client applications
+* [Configure Thunderbird as mail client (POP3/IMAP, SMTP and global ldap address book)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/mua/configure.thunderbird.md)
+# How to
+* [Allow certain users to send email as another user](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-allow.certain.users.to.send.email.as.different.user.md)
+* [Change mail attachment size](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-change.mail.attachment.size.md)
+* [Completely disable Amavisd + ClamAV + SpamAssassin](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-completely.disable.amavisd.clamav.spamassassin.md)
+* [Enable SMTPS service (SMTP over SSL, port 465)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-enable.smtps.md)
+* [Disable spam virus scanning for outgoing mails](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-disable.spam.virus.scanning.for.outgoing.mails.md)
+* [Amavisd + SpamAssassin not working, no mail header (X-Spam-*) inserted.](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-no.x-spam.headers.md)
+* [Quarantining](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-quarantining.md)
+* [Sign DKIM signature on outgoing emails for new mail domain](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-sign.dkim.signature.for.new.domain.md)
+* [Allow insecure POP3/IMAP/SMTP connections without STARTTLS](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/2-allow.insecure.pop3.imap.smtp.connections.md)
+* [Allow user to send email without authentication](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/allow.user.to.send.email.without.authentication.md)
+* [Force mail user to change password in 90 days](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/force.user.to.change.password.md)
+* [Ignore Trash folder in mailbox quota](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ignore.trash.folder.in.quota.md)
+* [LDAP: Add an alias domain](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.alias.domain.md)
+* [LDAP: Add a mail alias account](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.mail.alias.md)
+* [LDAP: Add a mail list account](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.mail.list.md)
+* [LDAP: User mail forwarding.](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.user.mail.forwarding.md)
+* [Monitor incoming and outgoing mails with BCC](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/monitor.incoming.and.outgoing.mails.with.bcc.md)
+* [Pipe incoming email for certain user to external script ](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/pipe.incoming.email.for.certain.user.to.external.script.md)
+* [Force Dovecot to recalculate mailbox quota](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/recalculate.mailbox.quota.md)
+* [SQL: Create an mail alias account with SQL command line](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/sql.create.mail.alias.md)
+* [Store SpamAssassin bayes in SQL](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/store.spamassassin.bayes.in.sql.md)
+
+Documents contributed by iRedMail users:
+
+* [Anti-spam with Dovecot antispam plugin and SpamAssassin](http://www.iredmail.org/forum/topic8169-iredmail-support-antispam-via-dovecot-and-spamassassin.html), contributed by Dexus.
+# Third-party integrations
+* [Integrate Microsoft Active Directory in iRedMail](https://bitbucket.org/zhb/docs.iredmail.org/src/default/integrations/active.directory.md)
+* [SOGo: install SOGo on CentOS 6 with iRedMail (MySQL backend)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/integrations/sogo-centos-6-mysql.md)
+
+Documents contributed by iRedMail users:
+
+* [Enabling Apache Solr 4.10 (using jetty) with Dovecot 2.2 for fulltext search results on Centos 6 (iRedMail compatible)](https://extremeshok.com/6622/enabling-apache-solr-4-10-using-jetty-with-dovecot-2-2-for-fulltext-search-results-on-centos-6-iredmail-compatible/)
+# Cluster
+
+Documents contributed by iRedMail users:
+
+* [An Ultra-HA, full Mult-Master E-mail cluster with iRedMail, MariaDB, and IPVS](http://pastebin.com/JcYeQBrX), contributed by Joshua Boniface.
+# Migrations
+* [Migrate iRedAdmin open source edition to iRedAdmin-Pro](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/migrate.or.upgrade.iredadmin.md)
+* [Migrate old iRedMail server to the latest stable release](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/migrate.to.new.iredmail.server.md)
+* [Password hashes](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/password.hashes.md)
+# Troubleshooting and Debug
+* [Turn on debug mode in Amavisd and SpamAssassin](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.amavisd.md)
+* [Turn on debug mode in Cluebringer](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.cluebringer.md)
+* [Turn on debug mode in Dovecot](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.dovecot.md)
+* [Turn on debug mode in iRedAPD](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.iredapd.md)
+* [Turn on debug mode in OpenLDAP](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.openldap.md)
+# Frequently Asked Questions
+* [Locations of configuration and log files of mojor components](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/file.locations.md)
+* [Why append timestamp in maildir path](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/why.append.timestamp.in.maildir.path.md)
+# Install iRedMail
+* [Install iRedMail on Red Hat Enterprise Linux, CentOS](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/0-install.iredmail.on.rhel.md)
+* [Install iRedMail on Debian or Ubuntu Linux](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/1-install.iredmail.on.debian.ubuntu.md)
+* [Install iRedMail on FreeBSD (without Jail)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/2-install.iredmail.on.freebsd.md)
+* [Install iRedMail on OpenBSD](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/3-install.iredmail.on.openbsd.md)
+* [Setup DNS records for your iRedMail server](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/setup_dns.md)
+* [Perform silent/unattended iRedMail installation](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/unattended.iredmail.installation.md)
+# Configure mail client applications
+* [Configure Thunderbird as mail client (POP3/IMAP, SMTP and global ldap address book)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/mua/configure.thunderbird.md)
+# How to
+* [Allow certain users to send email as another user](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-allow.certain.users.to.send.email.as.different.user.md)
+* [Change mail attachment size](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-change.mail.attachment.size.md)
+* [Completely disable Amavisd + ClamAV + SpamAssassin](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-completely.disable.amavisd.clamav.spamassassin.md)
+* [Enable SMTPS service (SMTP over SSL, port 465)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-enable.smtps.md)
+* [Disable spam virus scanning for outgoing mails](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-disable.spam.virus.scanning.for.outgoing.mails.md)
+* [Amavisd + SpamAssassin not working, no mail header (X-Spam-*) inserted.](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-no.x-spam.headers.md)
+* [Quarantining](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-quarantining.md)
+* [Sign DKIM signature on outgoing emails for new mail domain](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-sign.dkim.signature.for.new.domain.md)
+* [Allow insecure POP3/IMAP/SMTP connections without STARTTLS](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/2-allow.insecure.pop3.imap.smtp.connections.md)
+* [Allow user to send email without authentication](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/allow.user.to.send.email.without.authentication.md)
+* [Force mail user to change password in 90 days](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/force.user.to.change.password.md)
+* [Ignore Trash folder in mailbox quota](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ignore.trash.folder.in.quota.md)
+* [LDAP: Add an alias domain](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.alias.domain.md)
+* [LDAP: Add a mail alias account](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.mail.alias.md)
+* [LDAP: Add a mail list account](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.mail.list.md)
+* [LDAP: User mail forwarding.](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.user.mail.forwarding.md)
+* [Monitor incoming and outgoing mails with BCC](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/monitor.incoming.and.outgoing.mails.with.bcc.md)
+* [Pipe incoming email for certain user to external script ](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/pipe.incoming.email.for.certain.user.to.external.script.md)
+* [Force Dovecot to recalculate mailbox quota](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/recalculate.mailbox.quota.md)
+* [SQL: Create an mail alias account with SQL command line](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/sql.create.mail.alias.md)
+* [Store SpamAssassin bayes in SQL](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/store.spamassassin.bayes.in.sql.md)
+
+Documents contributed by iRedMail users:
+
+* [Anti-spam with Dovecot antispam plugin and SpamAssassin](http://www.iredmail.org/forum/topic8169-iredmail-support-antispam-via-dovecot-and-spamassassin.html), contributed by Dexus.
+# Third-party integrations
+* [Integrate Microsoft Active Directory in iRedMail](https://bitbucket.org/zhb/docs.iredmail.org/src/default/integrations/active.directory.md)
+* [SOGo: install SOGo on CentOS 6 with iRedMail (MySQL backend)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/integrations/sogo-centos-6-mysql.md)
+
+Documents contributed by iRedMail users:
+
+* [Enabling Apache Solr 4.10 (using jetty) with Dovecot 2.2 for fulltext search results on Centos 6 (iRedMail compatible)](https://extremeshok.com/6622/enabling-apache-solr-4-10-using-jetty-with-dovecot-2-2-for-fulltext-search-results-on-centos-6-iredmail-compatible/)
+# Cluster
+
+Documents contributed by iRedMail users:
+
+* [An Ultra-HA, full Mult-Master E-mail cluster with iRedMail, MariaDB, and IPVS](http://pastebin.com/JcYeQBrX), contributed by Joshua Boniface.
+# Migrations
+* [Migrate iRedAdmin open source edition to iRedAdmin-Pro](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/migrate.or.upgrade.iredadmin.md)
+* [Migrate old iRedMail server to the latest stable release](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/migrate.to.new.iredmail.server.md)
+* [Password hashes](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/password.hashes.md)
+# Troubleshooting and Debug
+* [Turn on debug mode in Amavisd and SpamAssassin](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.amavisd.md)
+* [Turn on debug mode in Cluebringer](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.cluebringer.md)
+* [Turn on debug mode in Dovecot](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.dovecot.md)
+* [Turn on debug mode in iRedAPD](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.iredapd.md)
+* [Turn on debug mode in OpenLDAP](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.openldap.md)
+# Frequently Asked Questions
+* [Locations of configuration and log files of mojor components](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/file.locations.md)
+* [Why append timestamp in maildir path](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/why.append.timestamp.in.maildir.path.md)
+# Install iRedMail
+* [Install iRedMail on Red Hat Enterprise Linux, CentOS](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/0-install.iredmail.on.rhel.md)
+* [Install iRedMail on Debian or Ubuntu Linux](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/1-install.iredmail.on.debian.ubuntu.md)
+* [Install iRedMail on FreeBSD (without Jail)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/2-install.iredmail.on.freebsd.md)
+* [Install iRedMail on OpenBSD](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/3-install.iredmail.on.openbsd.md)
+* [Setup DNS records for your iRedMail server](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/setup_dns.md)
+* [Perform silent/unattended iRedMail installation](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/unattended.iredmail.installation.md)
+# Configure mail client applications
+* [Configure Thunderbird as mail client (POP3/IMAP, SMTP and global ldap address book)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/mua/configure.thunderbird.md)
+# How to
+* [Allow certain users to send email as another user](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-allow.certain.users.to.send.email.as.different.user.md)
+* [Change mail attachment size](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-change.mail.attachment.size.md)
+* [Completely disable Amavisd + ClamAV + SpamAssassin](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-completely.disable.amavisd.clamav.spamassassin.md)
+* [Enable SMTPS service (SMTP over SSL, port 465)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-enable.smtps.md)
+* [Disable spam virus scanning for outgoing mails](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-disable.spam.virus.scanning.for.outgoing.mails.md)
+* [Amavisd + SpamAssassin not working, no mail header (X-Spam-*) inserted.](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-no.x-spam.headers.md)
+* [Quarantining](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-quarantining.md)
+* [Sign DKIM signature on outgoing emails for new mail domain](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-sign.dkim.signature.for.new.domain.md)
+* [Allow insecure POP3/IMAP/SMTP connections without STARTTLS](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/2-allow.insecure.pop3.imap.smtp.connections.md)
+* [Allow user to send email without authentication](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/allow.user.to.send.email.without.authentication.md)
+* [Force mail user to change password in 90 days](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/force.user.to.change.password.md)
+* [Ignore Trash folder in mailbox quota](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ignore.trash.folder.in.quota.md)
+* [LDAP: Add an alias domain](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.alias.domain.md)
+* [LDAP: Add a mail alias account](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.mail.alias.md)
+* [LDAP: Add a mail list account](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.mail.list.md)
+* [LDAP: User mail forwarding.](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.user.mail.forwarding.md)
+* [Monitor incoming and outgoing mails with BCC](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/monitor.incoming.and.outgoing.mails.with.bcc.md)
+* [Pipe incoming email for certain user to external script ](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/pipe.incoming.email.for.certain.user.to.external.script.md)
+* [Force Dovecot to recalculate mailbox quota](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/recalculate.mailbox.quota.md)
+* [SQL: Create an mail alias account with SQL command line](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/sql.create.mail.alias.md)
+* [Store SpamAssassin bayes in SQL](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/store.spamassassin.bayes.in.sql.md)
+
+Documents contributed by iRedMail users:
+
+* [Anti-spam with Dovecot antispam plugin and SpamAssassin](http://www.iredmail.org/forum/topic8169-iredmail-support-antispam-via-dovecot-and-spamassassin.html), contributed by Dexus.
+# Third-party integrations
+* [Integrate Microsoft Active Directory in iRedMail](https://bitbucket.org/zhb/docs.iredmail.org/src/default/integrations/active.directory.md)
+* [SOGo: install SOGo on CentOS 6 with iRedMail (MySQL backend)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/integrations/sogo-centos-6-mysql.md)
+
+Documents contributed by iRedMail users:
+
+* [Enabling Apache Solr 4.10 (using jetty) with Dovecot 2.2 for fulltext search results on Centos 6 (iRedMail compatible)](https://extremeshok.com/6622/enabling-apache-solr-4-10-using-jetty-with-dovecot-2-2-for-fulltext-search-results-on-centos-6-iredmail-compatible/)
+# Cluster
+
+Documents contributed by iRedMail users:
+
+* [An Ultra-HA, full Mult-Master E-mail cluster with iRedMail, MariaDB, and IPVS](http://pastebin.com/JcYeQBrX), contributed by Joshua Boniface.
+# Migrations
+* [Migrate iRedAdmin open source edition to iRedAdmin-Pro](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/migrate.or.upgrade.iredadmin.md)
+* [Migrate old iRedMail server to the latest stable release](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/migrate.to.new.iredmail.server.md)
+* [Password hashes](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/password.hashes.md)
+# Troubleshooting and Debug
+* [Turn on debug mode in Amavisd and SpamAssassin](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.amavisd.md)
+* [Turn on debug mode in Cluebringer](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.cluebringer.md)
+* [Turn on debug mode in Dovecot](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.dovecot.md)
+* [Turn on debug mode in iRedAPD](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.iredapd.md)
+* [Turn on debug mode in OpenLDAP](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.openldap.md)
+# Frequently Asked Questions
+* [Locations of configuration and log files of mojor components](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/file.locations.md)
+* [Why append timestamp in maildir path](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/why.append.timestamp.in.maildir.path.md)
+# Install iRedMail
+* [Install iRedMail on Red Hat Enterprise Linux, CentOS](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/0-install.iredmail.on.rhel.md)
+* [Install iRedMail on Debian or Ubuntu Linux](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/1-install.iredmail.on.debian.ubuntu.md)
+* [Install iRedMail on FreeBSD (without Jail)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/2-install.iredmail.on.freebsd.md)
+* [Install iRedMail on OpenBSD](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/3-install.iredmail.on.openbsd.md)
+* [Setup DNS records for your iRedMail server](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/setup_dns.md)
+* [Perform silent/unattended iRedMail installation](https://bitbucket.org/zhb/docs.iredmail.org/src/default/installation/unattended.iredmail.installation.md)
+# Configure mail client applications
+* [Configure Thunderbird as mail client (POP3/IMAP, SMTP and global ldap address book)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/mua/configure.thunderbird.md)
+# How to
+* [Allow certain users to send email as another user](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-allow.certain.users.to.send.email.as.different.user.md)
+* [Change mail attachment size](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-change.mail.attachment.size.md)
+* [Completely disable Amavisd + ClamAV + SpamAssassin](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-completely.disable.amavisd.clamav.spamassassin.md)
+* [Enable SMTPS service (SMTP over SSL, port 465)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/0-enable.smtps.md)
+* [Disable spam virus scanning for outgoing mails](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-disable.spam.virus.scanning.for.outgoing.mails.md)
+* [Amavisd + SpamAssassin not working, no mail header (X-Spam-*) inserted.](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-no.x-spam.headers.md)
+* [Quarantining](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-quarantining.md)
+* [Sign DKIM signature on outgoing emails for new mail domain](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/1-sign.dkim.signature.for.new.domain.md)
+* [Allow insecure POP3/IMAP/SMTP connections without STARTTLS](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/2-allow.insecure.pop3.imap.smtp.connections.md)
+* [Allow user to send email without authentication](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/allow.user.to.send.email.without.authentication.md)
+* [Force mail user to change password in 90 days](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/force.user.to.change.password.md)
+* [Ignore Trash folder in mailbox quota](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ignore.trash.folder.in.quota.md)
+* [LDAP: Add an alias domain](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.alias.domain.md)
+* [LDAP: Add a mail alias account](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.mail.alias.md)
+* [LDAP: Add a mail list account](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.add.mail.list.md)
+* [LDAP: User mail forwarding.](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/ldap.user.mail.forwarding.md)
+* [Monitor incoming and outgoing mails with BCC](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/monitor.incoming.and.outgoing.mails.with.bcc.md)
+* [Pipe incoming email for certain user to external script ](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/pipe.incoming.email.for.certain.user.to.external.script.md)
+* [Force Dovecot to recalculate mailbox quota](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/recalculate.mailbox.quota.md)
+* [SQL: Create an mail alias account with SQL command line](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/sql.create.mail.alias.md)
+* [Store SpamAssassin bayes in SQL](https://bitbucket.org/zhb/docs.iredmail.org/src/default/howto/store.spamassassin.bayes.in.sql.md)
+
+Documents contributed by iRedMail users:
+
+* [Anti-spam with Dovecot antispam plugin and SpamAssassin](http://www.iredmail.org/forum/topic8169-iredmail-support-antispam-via-dovecot-and-spamassassin.html), contributed by Dexus.
+# Third-party integrations
+* [Integrate Microsoft Active Directory in iRedMail](https://bitbucket.org/zhb/docs.iredmail.org/src/default/integrations/active.directory.md)
+* [SOGo: install SOGo on CentOS 6 with iRedMail (MySQL backend)](https://bitbucket.org/zhb/docs.iredmail.org/src/default/integrations/sogo-centos-6-mysql.md)
+
+Documents contributed by iRedMail users:
+
+* [Enabling Apache Solr 4.10 (using jetty) with Dovecot 2.2 for fulltext search results on Centos 6 (iRedMail compatible)](https://extremeshok.com/6622/enabling-apache-solr-4-10-using-jetty-with-dovecot-2-2-for-fulltext-search-results-on-centos-6-iredmail-compatible/)
+# Cluster
+
+Documents contributed by iRedMail users:
+
+* [An Ultra-HA, full Mult-Master E-mail cluster with iRedMail, MariaDB, and IPVS](http://pastebin.com/JcYeQBrX), contributed by Joshua Boniface.
+# Migrations
+* [Migrate iRedAdmin open source edition to iRedAdmin-Pro](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/migrate.or.upgrade.iredadmin.md)
+* [Migrate old iRedMail server to the latest stable release](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/migrate.to.new.iredmail.server.md)
+* [Password hashes](https://bitbucket.org/zhb/docs.iredmail.org/src/default/migrations/password.hashes.md)
+# Troubleshooting and Debug
+* [Turn on debug mode in Amavisd and SpamAssassin](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.amavisd.md)
+* [Turn on debug mode in Cluebringer](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.cluebringer.md)
+* [Turn on debug mode in Dovecot](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.dovecot.md)
+* [Turn on debug mode in iRedAPD](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.iredapd.md)
+* [Turn on debug mode in OpenLDAP](https://bitbucket.org/zhb/docs.iredmail.org/src/default/troubleshooting/turn.on.debug.mode.in.openldap.md)
+# Frequently Asked Questions
+* [Locations of configuration and log files of mojor components](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/file.locations.md)
+* [Why append timestamp in maildir path](https://bitbucket.org/zhb/docs.iredmail.org/src/default/faq/why.append.timestamp.in.maildir.path.md)
diff --git a/faq/file.locations.md b/faq/file.locations.md
index 2bfda0c7..f3c04f39 100644
--- a/faq/file.locations.md
+++ b/faq/file.locations.md
@@ -2,14 +2,62 @@
 
 [TOC]
 
+## Apache
+
+* On `RHEL`/`CentOS`: Apache config files are placed under `/etc/httpd/`.
+
+    * Main config file is `/etc/httpd/conf/httpd.conf`.
+    * Module config files are placed under `/etc/httpd/conf.d/` (old releases)
+      or `/etc/httpd/conf.modules.d/`.
+    * Root directory used to store web applications is `/var/www`, document
+      root is `/var/www/html/`.
+    * Log files are placed under `/var/www/httpd/`.
+
+* On `Debian`/`Ubuntu`: Apache config files are placed under `/etc/apache2`.
+
+    * Main config file is `/etc/apache2/apache2.conf`.
+    * Module config files are placed under `/etc/apache2/conf.d/` (old
+      releases) or `/etc/apache2/conf-available/`.
+    * Root directory used to store web applications is `/usr/share/apache2`,
+      document root is `/var/www/` (old releases) or `/var/www/html/`.
+    * Log files are placed under `/var/www/apache2/`.
+
+* On `FreeBSD`: Apache config files are placed under `/usr/local/etc/apache2`.
+
+    * Main config file is `/usr/local/etc/apache2/httpd.conf`.
+    * Module config files are placed under `/usr/local/etc/apache2/Includes/`.
+    * Root directory used to store web applications is `/usr/local/www/`,
+      document root is `/usr/local/www/apache22/data/`.
+    * Log files are placed under `/var/log/`, main log files are
+      `/var/log/httpd-access.log` and `/var/log/httpd-error.log`.
+
+* On `OpenBSD`: Apache (the one shipped in OpenBSD base system) config files
+  are placed under `/var/www/conf`.
+
+    * Main config file is `/var/www/conf/httpd.conf`.
+    * Module config files are placed under `/var/www/conf/modules/`.
+    * Root directory used to store web applications is `/var/www/`,
+      document root is `/var/www/htdocs/`.
+    * Log files are placed under `/var/www/logs/`.
+
+## Nginx
+
+* On `Linux` and `OpenBSD`: Nginx config files are placed under `/etc/nginx/`,
+  uWSGI config files are placed under `/etc/uwsgi/`.
+* On `FreeBSD`: Nginx config files are placed under `/usr/local/etc/nginx`,
+  uWSGI config files are placed under `/usr/local/etc/uwsgi/`.
+
+Main config files are `nginx.conf` and `default.conf`.
+
+* On `Linux` and `FreeBSD`: log files are placed under `/var/log/nginx/`.
+* On `OpenBSD`: log files are placed under `/var/www/logs/` (same as Apache).
+
 ## Postfix
 
 * on `Linux` and `OpenBSD`, Postfix config files are placed under `/etc/postfix/`.
 * on `FreeBSD`, Postfix config files are placed under `/usr/local/etc/postfix/`.
 
-### Config files
-
-Main config files:
+### Main config files:
 
 * `main.cf`: contains most configurations.
 * `master.cf`: contains transport related settings.
diff --git a/html/file.locations.html b/html/file.locations.html
index d7750a97..3feab82f 100644
--- a/html/file.locations.html
+++ b/html/file.locations.html
@@ -14,18 +14,20 @@
 <div class="toc">
 <ul>
 <li><a href="#locations-of-configuration-and-log-files-of-mojor-components">Locations of configuration and log files of mojor components</a><ul>
+<li><a href="#apache">Apache</a></li>
+<li><a href="#nginx">Nginx</a></li>
 <li><a href="#postfix">Postfix</a><ul>
-<li><a href="#config-files">Config files</a></li>
+<li><a href="#main-config-files">Main config files:</a></li>
 <li><a href="#log-files">Log files</a></li>
 </ul>
 </li>
 <li><a href="#dovecot">Dovecot</a><ul>
-<li><a href="#config-files_1">Config files</a></li>
+<li><a href="#config-files">Config files</a></li>
 <li><a href="#log-files_1">Log files</a></li>
 </ul>
 </li>
 <li><a href="#amavisd">Amavisd</a><ul>
-<li><a href="#main-config-files">Main config files</a></li>
+<li><a href="#main-config-files_1">Main config files</a></li>
 <li><a href="#log-files_2">Log files</a></li>
 </ul>
 </li>
@@ -33,13 +35,71 @@
 </li>
 </ul>
 </div>
+<h2 id="apache">Apache</h2>
+<ul>
+<li>
+<p>On <code>RHEL</code>/<code>CentOS</code>: Apache config files are placed under <code>/etc/httpd/</code>.</p>
+<ul>
+<li>Main config file is <code>/etc/httpd/conf/httpd.conf</code>.</li>
+<li>Module config files are placed under <code>/etc/httpd/conf.d/</code> (old releases)
+  or <code>/etc/httpd/conf.modules.d/</code>.</li>
+<li>Root directory used to store web applications is <code>/var/www</code>, document
+  root is <code>/var/www/html/</code>.</li>
+<li>Log files are placed under <code>/var/www/httpd/</code>.</li>
+</ul>
+</li>
+<li>
+<p>On <code>Debian</code>/<code>Ubuntu</code>: Apache config files are placed under <code>/etc/apache2</code>.</p>
+<ul>
+<li>Main config file is <code>/etc/apache2/apache2.conf</code>.</li>
+<li>Module config files are placed under <code>/etc/apache2/conf.d/</code> (old
+  releases) or <code>/etc/apache2/conf-available/</code>.</li>
+<li>Root directory used to store web applications is <code>/usr/share/apache2</code>,
+  document root is <code>/var/www/</code> (old releases) or <code>/var/www/html/</code>.</li>
+<li>Log files are placed under <code>/var/www/apache2/</code>.</li>
+</ul>
+</li>
+<li>
+<p>On <code>FreeBSD</code>: Apache config files are placed under <code>/usr/local/etc/apache2</code>.</p>
+<ul>
+<li>Main config file is <code>/usr/local/etc/apache2/httpd.conf</code>.</li>
+<li>Module config files are placed under <code>/usr/local/etc/apache2/Includes/</code>.</li>
+<li>Root directory used to store web applications is <code>/usr/local/www/</code>,
+  document root is <code>/usr/local/www/apache22/data/</code>.</li>
+<li>Log files are placed under <code>/var/log/</code>, main log files are
+  <code>/var/log/httpd-access.log</code> and <code>/var/log/httpd-error.log</code>.</li>
+</ul>
+</li>
+<li>
+<p>On <code>OpenBSD</code>: Apache (the one shipped in OpenBSD base system) config files
+  are placed under <code>/var/www/conf</code>.</p>
+<ul>
+<li>Main config file is <code>/var/www/conf/httpd.conf</code>.</li>
+<li>Module config files are placed under <code>/var/www/conf/modules/</code>.</li>
+<li>Root directory used to store web applications is <code>/var/www/</code>,
+  document root is <code>/var/www/htdocs/</code>.</li>
+<li>Log files are placed under <code>/var/www/logs/</code>.</li>
+</ul>
+</li>
+</ul>
+<h2 id="nginx">Nginx</h2>
+<ul>
+<li>On <code>Linux</code> and <code>OpenBSD</code>: Nginx config files are placed under <code>/etc/nginx/</code>,
+  uWSGI config files are placed under <code>/etc/uwsgi/</code>.</li>
+<li>On <code>FreeBSD</code>: Nginx config files are placed under <code>/usr/local/etc/nginx</code>,
+  uWSGI config files are placed under <code>/usr/local/etc/uwsgi/</code>.</li>
+</ul>
+<p>Main config files are <code>nginx.conf</code> and <code>default.conf</code>.</p>
+<ul>
+<li>On <code>Linux</code> and <code>FreeBSD</code>: log files are placed under <code>/var/log/nginx/</code>.</li>
+<li>On <code>OpenBSD</code>: log files are placed under <code>/var/www/logs/</code> (same as Apache).</li>
+</ul>
 <h2 id="postfix">Postfix</h2>
 <ul>
 <li>on <code>Linux</code> and <code>OpenBSD</code>, Postfix config files are placed under <code>/etc/postfix/</code>.</li>
 <li>on <code>FreeBSD</code>, Postfix config files are placed under <code>/usr/local/etc/postfix/</code>.</li>
 </ul>
-<h3 id="config-files">Config files</h3>
-<p>Main config files:</p>
+<h3 id="main-config-files">Main config files:</h3>
 <ul>
 <li><code>main.cf</code>: contains most configurations.</li>
 <li><code>master.cf</code>: contains transport related settings.</li>
@@ -59,7 +119,7 @@
 <li>on <code>Linux</code> and <code>OpenBSD</code>, Dovecot config files are placed under <code>/etc/dovecot/</code>.</li>
 <li>on <code>FreeBSD</code>, Dovecot config files are placed under <code>/usr/local/etc/dovecot/</code>.</li>
 </ul>
-<h3 id="config-files_1">Config files</h3>
+<h3 id="config-files">Config files</h3>
 <p>Main config file is <code>dovecot.conf</code>. It contains most configurations.</p>
 <p>Addition config files:</p>
 <ul>
@@ -78,7 +138,7 @@
 <li><code>/var/log/dovecot-lmtp.log</code>: LMTP related log.</li>
 </ul>
 <h2 id="amavisd">Amavisd</h2>
-<h3 id="main-config-files">Main config files</h3>
+<h3 id="main-config-files_1">Main config files</h3>
 <ul>
 <li>on <code>RHEL/CentOS</code>: it's <code>/etc/amavisd/amavisd.conf</code>.</li>
 <li>