diff --git a/cleanup-mastodon-users.sh b/cleanup-mastodon-users.sh
new file mode 100755
index 0000000..b6a0817
--- /dev/null
+++ b/cleanup-mastodon-users.sh
@@ -0,0 +1,164 @@
+#!/bin/sh
+
+# LOWERLIMIT="'6 months'" or "'24 weeks'"
+# UPPERLIMIT="'7 months'" or "'28 weeks'"
+# this defines the range of inactivity where users get notified
+# before the account will be deleted when UPPERLIMIT is surpassed.
+LOWERLIMIT="6 months"
+UPPERLIMIT="7 months"
+
+TOOTCTL="~/live/bin/tootctl"
+
+set -f
+
+# get some settings from the Mastodon config and write it to another file, so that we can source it and make use of it
+grep -e ^"DB_" -e ^"LOCAL_DOMAIN" /home/mastodon/live/.env.production > /home/mastodon/bin/cleanup-mastodon-users.conf
+. /home/mastodon/bin/cleanup-mastodon-users.conf
+
+# the following lines should be moved to a config file, eg. /usr/local/etc/cleanup_friendica.conf
+mastodonpath="/home/mastodon/live"
+#DB_HOST=127.0.0.1
+#DB_PORT=6432
+#DB_NAME=mastodon
+#DB_USER=mastodon
+#DB_PASS=
+
+site="<SITETITEL>"
+siteurl="<SITEURL>"
+siteadmin="<ADMINMAIL"
+sitefrom="no-reply@<SITEDOMAIN>"
+protectedusers="<space seperated list of protected accounts, eg: user1 user2>"
+sqlprotectedusers="<same, but with delimiters for SQL, eg:'user1', 'user2'>"
+
+case $1 in
+	"--dry-run")
+		mode="dryrun"
+		;;
+	"--dowhatimean")
+		mode="hotrun"
+		;;
+	*)
+		echo "Usage: "
+		echo " --dry-run \t: make a dry-run, no deletion will be done, no mails are sent."
+		echo " --dowhatimean \t: add this option if you really want to delete users."
+		exit 0
+		;;
+esac
+
+#. /usr/local/etc/cleanup_friendica.conf
+
+# make a list to be used for grep -E 
+protected=$(echo $protectedusers | sed 's/\"//g' | sed 's/\ /\\\|/g')
+echo $protected 
+
+cd ${mastodonpath} || exit 0
+
+# notify the user that s/he needs to re-login after 6 months to prevent account deletion
+notifyUser () {
+	( cat <<EOF  
+Dear ${dispname}, 
+
+you have registered your account on ${siteurl} at ${registered} and last time you logged in was at ${lastlogin}. 
+
+If you want to continue to keep your Mastodon account on ${SITE} then please log in at least every 6 months via web browser to keep your account alive. Otherwise we assume that you don't want to use it anymore and will cancel your account 7 months after your last login. 
+
+You can access your profile at ${profileurl} or you can cancel your account on your own when logged in at ${siteurl}removeme - however we would like to see you become an active user again and contribute to the Fediverse, but of course it's up to you.  
+
+Sincerely,
+your ${site} admins
+    		
+EOF
+	) | sed 's/_/\ /g' | /usr/bin/mail -s "The Fediverse misses you, ${username}!" -r "${sitefrom}" -- "${usermail}"
+	# add '-b "$siteadmin"' before the "--" above to receive BCC mails 
+}
+
+# notify user that the account has been deleted because of inactivity
+notifyUserDeletion () {
+	( cat <<EOF  
+Dear ${dispname}, 
+
+you have registered your accoutn on ${siteurl} at ${registered} and last time you logged in was at ${lastlogin}. 
+
+Since you haven't reacted to the previous mails and didn't login again, your account including all your data has now been deleted. 
+
+Sincerely,
+your ${site} admins
+    		
+EOF
+	) | sed 's/_/\ /g' | /usr/bin/mail -s "Your account ${username} on ${site} has been deleted!" -r "${sitefrom}" -- "${usermail}"
+	# add '-b "$siteadmin"' before the "--" above to receive BCC mails 
+}
+
+for line in $(psql -U ${DB_USER} -w -h ${DB_HOST} -p ${DB_PORT} -t ${DB_NAME} -c "select concat(username||','||email) from accounts a, users u where domain is null and a.id=u.account_id and last_sign_in_at is null and u.created_at < now()-'2 weeks'::interval and username not in (${sqlprotectedusers})"| tr -d " "); do
+	#echo ${line}
+	username=$(echo ${line} | cut -f1 -d"," )
+	mail=$(echo ${line} | cut -f2 -d"," )
+	# if username is a protected user do nothing, else delete user
+	if [ -n "${protectedusers}" ]; then
+		pcheck=0
+		for s in $(echo ${protectedusers}) ; do
+			if [ "${s}" = "${username}" ]; then
+				pcheck=1
+			fi
+		done
+		if [ ${pcheck} -eq 0 ]; then
+			echo "Delete unconfirmed user ${username}"
+			if [ "${mode}" = "hotrun" ]; then
+				${mastodonpath}/bin/tootctl accounts delete "${username}"
+			elif [ "${mode}" = "dryrun" ]; then
+				echo "${username}: skipped because of dryrun."
+			fi
+		fi
+	fi
+done
+
+# find & notify users that didn't logged in >6 months and send mail to log in again
+for mode2 in $(echo "warn delete"); do
+	#echo "mode2: $mode2"
+	case ${mode2} in
+		"warn")
+			#echo "in warn"
+			SQLSTATE="last_sign_in_at between now()-'${UPPERLIMIT}'::interval and now()-'${LOWERLIMIT}'::interval" 
+			;;
+		"delete")
+			#echo "in delete"
+			SQLSTATE="last_sign_in_at < now()-'${UPPERLIMIT}'::interval"
+			;;
+	esac
+	#echo "SQL: $SQLSTATE"
+	for u in $( psql -U ${DB_USER} -w -h ${DB_HOST} -p ${DB_PORT} -t ${DB_NAME} -c "select concat(username||';'||display_name||';'||email||';'||to_char(a.created_at, 'YYYY-MM-DD')||';'||to_char(last_sign_in_at,'YYYY-MM-DD')) from accounts a, users u where domain is null and a.id=u.account_id and ${SQLSTATE} and username not in ($sqlprotectedusers) order by last_sign_in_at" | tr -d " " ); do 
+		#echo ${u}
+		username=$(echo "${u}" | awk -F ";" '{print $1}')
+		dispname=$(echo "${u}" | awk -F ";" '{print $2}')
+		profileurl="https://nerdculture.de/@${username}"
+		usermail=$(echo "${u}" | awk -F ";" '{print $3}')
+		registered=$(echo "${u}" | awk -F ";" '{print $4}')
+		lastlogin=$(echo "${u}" | awk -F ";" '{print $5}')
+		case ${mode2} in
+			"warn")
+				if [ "${mode}" = "hotrun" ]; then
+					#echo -n "hotrun  "
+    					notifyUser
+				elif [ "${mode}" = "dryrun" ]; then
+					echo "Check ${username}: notify skipped because of dryrun."
+				fi
+				;;
+			"delete")
+	   			# delete account when last login is older than 7 months and send mail about deletion
+    			# you should copy & paste the text from 6 months for the first runs of this script
+    			# and later change the text to a notification that the account has been deleted. 
+				# if username is a protected user do nothing, else delete user
+				echo -n "${username} : "
+				if [ "${mode}" = "hotrun" ]; then
+					#echo -n "hotrun  "
+					${mastodonpath}/bin/tootctl accounts delete "${username}" 
+					notifyUserDeletion
+					#echo "deleted."
+				elif [ "${mode}" = "dryrun" ]; then
+					echo "skipped because of dryrun."
+				fi
+				;;
+		esac
+	done
+done
+