diff --git a/README.md b/README.md
index 5a19405..b04dc66 100644
--- a/README.md
+++ b/README.md
@@ -80,10 +80,46 @@ If Let's Encrypt is disabled, the Piler is at http://your-piler-domain or at htt
 > After installation, any changes can be made in piler.conf at any time and the install script can then be run again.
 
 
+**********************************************************************************************************
+
+### Using the Piler on the command line
+
+For use on the command line, we first log into the container.
+
+```
+docker exec -it piler /bin/bash
+```
+
+Next we switch to the user "piler"
+
+```
+su piler
+```
+
+To get write permissions, we switch to the /var/tmp folder
+
+```
+cd /var/tmp
+```
+
+Here you can now execute the functions of the Piler on the command line.
+Here are some examples:
+
+```
+pilerimport -h
+crontab -l
+```
+
+To leave the container on the console you have to execute 2x `exit`.
+
+
 **********************************************************************************************************
 
 ## Changelog
 
+### 0.3.0 (10.03.2022)
+* (simatec) purge option added to config
+
 ### 0.2.0 (09.03.2022)
 * (simatec) Let's Encrypt added
 
diff --git a/install-piler.sh b/install-piler.sh
index c5aef5d..799b24b 100644
--- a/install-piler.sh
+++ b/install-piler.sh
@@ -69,6 +69,8 @@ fi
 
 docker-compose up -d
 
+sleep 5
+
 echo
 echo "${blue}${HLINE}"
 echo "${blue}             backup the File config-site.php"
@@ -143,6 +145,10 @@ cat >> /var/lib/docker/volumes/piler-docker_piler_etc/_data/config-site.php <<EO
 //\$config['LDAP_ACCOUNT_OBJECTCLASS'] = 'person';
 //\$config['LDAP_DISTRIBUTIONLIST_OBJECTCLASS'] = 'person';
 //\$config['LDAP_DISTRIBUTIONLIST_ATTR'] = 'mailAlternativeAddress';
+
+// special settings.
+//\$config['MEMCACHED_ENABLED'] = 1;
+\$config['SPHINX_STRICT_SCHEMA'] = 1; // required for Sphinx see https://bitbucket.org/jsuto/piler/issues/1085/sphinx-331.
 EOF
 
 if [ "$USE_MAILCOW" = true ]; then
@@ -166,6 +172,22 @@ EOF
 curl -o /var/lib/docker/volumes/piler-docker_piler_etc/_data/auth-mailcow.php https://raw.githubusercontent.com/patschi/mailpiler-mailcow-integration/master/auth-mailcow.php
 fi
 
+# add config settings
+
+if [ ! -f /var/lib/docker/volumes/piler-docker_piler_etc/_data/piler.conf.bak ]; then
+    cp /var/lib/docker/volumes/piler-docker_piler_etc/_data/piler.conf /var/lib/docker/volumes/piler-docker_piler_etc/_data/piler.conf.bak
+else
+    rm /var/lib/docker/volumes/piler-docker_piler_etc/_data/piler.conf
+    cp /var/lib/docker/volumes/piler-docker_piler_etc/_data/piler.conf.bak /var/lib/docker/volumes/piler-docker_piler_etc/_data/piler.conf
+fi
+
+sed -i "s/default_retention_days=.*/default_retention_days=$DEFAULT_RETENTION_DAYS/" /var/lib/docker/volumes/piler-docker_piler_etc/_data/piler.conf
+sed -i "s/update_counters_to_memcached=.*/update_counters_to_memcached=1/" /var/lib/docker/volumes/piler-docker_piler_etc/_data/piler.conf
+
+cat >> /var/lib/docker/volumes/piler-docker_piler_etc/_data/piler.conf <<EOF
+queuedir=/var/piler/store
+EOF
+
 # docker restart
 echo
 echo "${blue}${HLINE}"
diff --git a/piler.conf b/piler.conf
index 8a3c016..ff36507 100644
--- a/piler.conf
+++ b/piler.conf
@@ -8,6 +8,10 @@ PILER_DOMAIN="piler.example.com"
 
 SUPPORT_MAIL="admin@example.com"
 
+# retention days (default 2555 Days ~ 7 Years)
+
+DEFAULT_RETENTION_DAYS="2555"
+
 # your IMAP Server
 
 IMAP_SERVER="imap.example.com"