diff --git a/Makefile b/Makefile
index 65360b4..b8bdae1 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,6 @@ build:
 
 install:
 	mkdir -p $(DESTDIR)$(PREFIX)/bin $(DESTDIR)/etc $(DESTDIR)/lib/systemd/system
-	install -m755 mlmmj-ldap-sync $(DESTDIR)$(PREFIX)/bin/mlmmj-ldap-sync
-	install -m644 conf.example.toml $(DESTDIR)/etc/mlmmj-ldap-sync.toml
-	install -m644 mlmmj-ldap-sync.service mlmmj-ldap-sync.timer $(DESTDIR)/lib/systemd/system
-	install -m644 mlmmj-ldap-sync@.service mlmmj-ldap-sync@.timer $(DESTDIR)/lib/systemd/system
+	install -m755 mailman3-ldap-sync $(DESTDIR)$(PREFIX)/bin/mailman3-ldap-sync
+	install -m644 conf.example.toml $(DESTDIR)/etc/mailman3-ldap-sync.toml
+	install -m644 mailman3-ldap-sync.service mailman3-ldap-sync.timer $(DESTDIR)/lib/systemd/system
diff --git a/README.md b/README.md
index 1249f9e..5b256ea 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
-# mlmmj-ldap-sync
+# mailman3-ldap-sync
 
-Allows to sync LDAP groups with mlmmj lists.
+Simple script to sync mailman3 lists with LDAP groups, forked from [GNU Generation's
+mlmmj-ldap-sync](https://gitlab.gnugen.ch/gnugen/mlmmj-ldap-sync).
diff --git a/conf.example.toml b/conf.example.toml
index 7d59ee0..a2f772b 100644
--- a/conf.example.toml
+++ b/conf.example.toml
@@ -1,24 +1,16 @@
-domain = "unipoly.ch"
-lists_add = ["membres"]
-lists_remove = ["membres"]
+domain = "lists.recycled.cloud"
+lists = [ 'demo' ]
 
 [ldap]
-host = "ldap.gnugen.ch"
-port = 389
+host = "ldap1.recycled.cloud"
+port = 636
 
 [ldap.auth]
-username = "cn=unipoly-mlmmj,ou=Services,dc=unipoly,dc=epfl,dc=ch"
+username = "uid=mailman3-ldap-sync,ou=services,dc=recycled,dc=cloud"
 password = "secret"
 
 [ldap.lists]
-basetree = "ou=Lists,dc=unipoly,dc=epfl,dc=ch"
+basetree = "ou=groups,dc=recycled,dc=cloud"
 
 [ldap.users]
-basetree = "ou=Users,dc=unipoly,dc=epfl,dc=ch"
-
-[mlmmj]
-basepath = "/var/spool/mlmmj"
-list_binary = "/usr/bin/mlmmj-list"
-sub_binary = "/usr/bin/mlmmj-sub"
-unsub_binary = "/usr/bin/mlmmj-unsub"
-
+basetree = "ou=users,dc=recycled,dc=cloud"
diff --git a/debian/changelog b/debian/changelog
index 3a5cb3d..983757e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,38 +1,5 @@
-mlmmj-ldap-sync (0.6) unstable; urgency=medium
-
-  * Adapt code for GNU Generation LDAP structure.
-  * Fix systemd unit files installation.
-
- -- Timothée Floure <timothee.floure@epfl.ch>  Thu, 31 Oct 2019 17:49:44 +0100
-
-mlmmj-ldap-sync (0.5) unstable; urgency=medium
-
-  * Rename package from unipoly-mlmmj-ldap-sync to mlmmj-ldap-sync.
-  * Support custom path for the configuration file.
-
- -- Timothée Floure <timothee.floure@epfl.ch>  Wed, 30 Oct 2019 12:20:01 +0100
-
-unipoly-mlmmj-ldap-sync (0.4) unstable; urgency=medium
-
-  * Fix typo in remove_subscriber_from
-
- -- Timothée Floure <timothee.floure@epfl.ch>  Mon, 25 Feb 2019 17:47:40 +0100
-
-unipoly-mlmmj-ldap-sync (0.3) unstable; urgency=medium
-
-  * Dissociate addition and removal of users.
-
- -- Timothée Floure <timothee.floure@epfl.ch>  Sun, 23 Dec 2018 12:45:58 +0100
-
-unipoly-mlmmj-ldap-sync (0.2) unstable; urgency=low
-
-  * Add systemd units.
-  * Add default configuration file.
-
- -- Timothée Floure <timothee.floure@epfl.ch>  Wed, 22 Aug 2018 16:25:00 +0200
-
-unipoly-mlmmj-ldap-sync (0.1) unstable; urgency=low
+mailman3-ldap-sync (0.1) unstable; urgency=medium
 
   * Let there be package.
 
- -- Timothée Floure <timothee.floure@epfl.ch>  Fri, 29 Jun 2018 12:02:05 +0200
+ -- Timothée Floure <t.floure@e-durable.ch>  Thu, 24 Nov 2020 09:17:00 +0100
diff --git a/debian/control b/debian/control
index 03bb17f..5e8f21e 100644
--- a/debian/control
+++ b/debian/control
@@ -1,15 +1,15 @@
-Source: mlmmj-ldap-sync
+Source: mailman3-ldap-sync
 Section: admin
 Priority: optional
 Maintainer: Timothée Floure <timothee.floure@epfl.ch>
 Build-Depends: debhelper (>= 9)
 Standards-Version: 4.1.1
-Homepage: https://gitlab.gnugen.ch/gnugen/mlmmj-ldap-sync
-Vcs-Git: git://gitlab.gnugen.ch/gnugen/mlmmj-ldap-sync.git
+Homepage: https://code.recycled.cloud/e-Durable/mailman3-ldap-sync
+Vcs-Git: https://code.recycled.cloud/e-Durable/mailman3-ldap-sync
 
-Package: mlmmj-ldap-sync
+Package: mailman3-ldap-sync
 Architecture: all
 Depends: ruby, ruby-net-ldap, ruby-toml, ${misc:Depends}
-Description: Cronjobs to maintain the synchronization of mlmmj mailing lists.
+Description: Cronjobs to maintain the synchronization of mailman3 mailing lists.
  This package installs cronjobs to maintain the synchronization between LDAP
  groups and mailing lists.
diff --git a/debian/copyright b/debian/copyright
index f612ee2..b105e0e 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -1,11 +1,11 @@
 Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 
 Files: *
-Copyright: 2018 Timothée Floure <timothee.floure@fnux.ch>
+Copyright: 2018 Timothée Floure <t.floure@e-durable.ch>
 License: Apache-2.0
 
 Files: debian/*
-Copyright: 2018 Timothée Floure <timothee.floure@epfl.ch>
+Copyright: 2018 Timothée Floure <t.floure@e-durable.ch>
 License: Apache-2.0
 
 License: Apache-2.0
diff --git a/mailman3-ldap-sync b/mailman3-ldap-sync
new file mode 100755
index 0000000..c75fce6
--- /dev/null
+++ b/mailman3-ldap-sync
@@ -0,0 +1,146 @@
+#!/usr/bin/env ruby
+
+require 'toml'
+require 'net/ldap'
+require 'English'
+require 'open3'
+
+@mailman3_exec = '/usr/bin/mailman'
+@configuration_file = '/etc/mailman3-ldap-sync.toml'
+@configuration = nil
+
+def read_configuration(path)
+  begin
+    TOML.load_file(path)
+  rescue Errno::ENOENT => e
+    puts "Could not open configuration file: #{e}"
+    exit(1)
+  end
+end
+
+def connect_ldap
+  conn = Net::LDAP.new(
+    host: @configuration['ldap']['host'],
+    port: @configuration['ldap']['port'],
+    encryption: :simple_tls,
+    auth: {
+      method: :simple,
+      username: @configuration['ldap']['auth']['username'],
+      password: @configuration['ldap']['auth']['password']
+    }
+  )
+
+  ldap_addr = "#{@configuration['ldap']['host']}:#{@configuration['ldap']['port']}"
+  begin
+    if conn.bind
+      conn
+    else
+      puts "Failed to authenticate against LDAP server: #{ldap_addr}"
+      exit(1)
+    end
+  rescue Net::LDAP::LdapError => e
+    puts "Failed to contact LDAP server: #{ldap_addr}"
+    puts e
+    exit(1)
+  end
+end
+
+def get_mailman3_subscribers(list)
+  unless File.executable?(@mailman3_exec)
+    puts "could not execute #{@mailman3_exec}"
+    exit(1)
+  end
+
+  # Execute mailman and check whether it exited successfuly
+  raw = `#{@mailman3_exec} members #{list}`
+  unless $CHILD_STATUS.exitstatus.zero?
+    puts 'FAIL'
+    exit(1)
+  end
+
+  # Return a list of mail addresses.
+  raw.split("\n")
+end
+
+def add_subscribers_to(list, addresses)
+  # The address is not subscribed to the list yet.
+  print "Adding #{addresses.size} addresses... "
+
+  # Subscribe the address to the list.
+  Open3.popen3(@mailman3_exec, 'members', '-a', '-', list) do |stdin, stdout, _stderr, wait_thr|
+    stdin.write(addresses.join("\n"))
+    stdin.close_write
+
+    process = wait_thr.value
+    if process.exitstatus.zero?
+      puts 'OK'
+    else
+      puts 'FAILED'
+    end
+
+    puts '> Mailman output:'
+    puts stdout.read
+  end
+end
+
+def sync_list(list_name, ldap_group_entry, ldap_conn)
+  user_basetree = @configuration['ldap']['users']['basetree']
+  list = "#{list_name}@#{@configuration['domain']}"
+
+  ldap_members = ldap_group_entry.memberuid.map do |uid|
+    filter = Net::LDAP::Filter.eq('uid', uid)
+    matched_ldap_users = ldap_conn.search(base: user_basetree, filter: filter)
+    if matched_ldap_users.nil? || matched_ldap_users.empty?
+      ''
+    else
+      user = matched_ldap_users.first
+      address = user.mail.first # 'mail' is an array for some reason.
+
+      address
+    end
+  end
+
+  ldap_members.select! {|e| not e.empty? }
+  puts "Found #{ldap_group_entry.dn} with #{ldap_members.size} members"
+
+  # Extract mail addresses from Mailman
+  print 'Searchin mailman... '
+  mailman3_subscribers = get_mailman3_subscribers(list)
+  puts 'OK'
+  puts "Found #{list} with #{mailman3_subscribers.size} subscribers"
+
+  # Add found addresses to the list.
+  add_subscribers_to(list, ldap_members)
+end
+
+def main
+  # Parse configuration, bind to LDAP server
+  configuration_file = ARGV[0] ? ARGV[0] : @configuration_file
+  @configuration = read_configuration(configuration_file)
+  ldap_conn = connect_ldap
+
+  domain = @configuration['domain']
+  list_basetree = @configuration['ldap']['lists']['basetree']
+  lists = @configuration['lists']
+
+  # Sync mailman3 lists with LDAP groups
+  lists.each do |list_name|
+    puts ">> Processing list #{list_name}@#{domain}"
+    print 'Searching LDAP... '
+
+    filter = Net::LDAP::Filter.eq('cn', list_name)
+    matched_ldap_groups = ldap_conn.search(base: list_basetree, filter: filter)
+    if matched_ldap_groups.nil? || matched_ldap_groups.empty?
+      # Could not find matching LDAP group
+      puts 'NOT FOUND'
+    else
+      puts 'OK'
+      ldap_group_entry = matched_ldap_groups.first
+      sync_list(list_name, ldap_group_entry, ldap_conn)
+    end
+  end
+end
+
+###
+# Execute script:
+main
diff --git a/mailman3-ldap-sync.service b/mailman3-ldap-sync.service
new file mode 100644
index 0000000..b7e6244
--- /dev/null
+++ b/mailman3-ldap-sync.service
@@ -0,0 +1,7 @@
+[Unit]
+Description=Synchronize mailman3 mailing lists with LDAP groups
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/mailman3-ldap-sync
diff --git a/mlmmj-ldap-sync@.timer b/mailman3-ldap-sync.timer
similarity index 54%
rename from mlmmj-ldap-sync@.timer
rename to mailman3-ldap-sync.timer
index 3b99c39..806545d 100644
--- a/mlmmj-ldap-sync@.timer
+++ b/mailman3-ldap-sync.timer
@@ -1,5 +1,5 @@
 [Unit]
-Description=Synchronize mlmmj mailing lists with LDAP groups once a day
+Description=Synchronize mailman3 mailing lists with LDAP groups once a day
 
 [Timer]
 OnCalendar=*-*-* 3:00:00
diff --git a/mlmmj-ldap-sync b/mlmmj-ldap-sync
deleted file mode 100755
index 6f375b7..0000000
--- a/mlmmj-ldap-sync
+++ /dev/null
@@ -1,182 +0,0 @@
-#!/usr/bin/env ruby
-
-require 'toml'
-require 'net/ldap'
-require 'English'
-
-@configuration_file = '/etc/mlmmj-ldap-sync.toml'
-@configuration = nil
-
-def read_configuration(path)
-  begin
-    TOML.load_file(path)
-  rescue Errno::ENOENT => raised_error
-    puts "Could not open configuration file: #{raised_error}"
-    exit(1)
-  end
-end
-
-def connect_ldap
-  conn = Net::LDAP.new(
-    host: @configuration['ldap']['host'],
-    port: @configuration['ldap']['port'],
-    auth: {
-      method: :simple,
-      username: @configuration['ldap']['auth']['username'],
-      password: @configuration['ldap']['auth']['password']
-    }
-  )
-
-  ldap_addr = @configuration['ldap']['host'] + ':' +
-              @configuration['ldap']['port'].to_s
-  begin
-    if conn.bind
-      conn
-    else
-      puts "Failed to authenticate against LDAP server: #{ldap_addr}"
-      exit(1)
-    end
-  rescue LdapError => raised_error
-    puts "Failed to contact LDAP server: #{ldap_addr}"
-    puts raised_error
-    exit(1)
-  end
-end
-
-def get_mlmmj_subscribers(list)
-  mlmmj_list_binary = @configuration['mlmmj']['list_binary']
-
-  unless File.executable?(mlmmj_list_binary)
-    puts "could not execute #{mlmmj_list_binary}"
-    exit(1)
-  end
-
-  # Execute mlmmj-list and check whether it exited successfuly
-  raw = `#{mlmmj_list_binary} -L #{list} -s`
-  unless $CHILD_STATUS.exitstatus.zero?
-    puts 'FAIL'
-    exit(1)
-  end
-
-  # Return a list of mail addresses.
-  raw.split("\n")
-end
-
-def add_subscriber_to(list_name, subscribers, list, addr)
-  if subscribers.include?(addr)
-    # The address is already subscribed to the list: we're done with it.
-    subscribers.delete(addr)
-  else
-    # The address is not subscribed to the list yet.
-    print "Adding #{addr}... "
-
-    # Since the configuration file doesn't say we have to add new subscribers
-    # to this list, we ignore this action.
-    unless @configuration['lists_add'].include?(list_name)
-      puts 'IGNORED'
-      return
-    end
-
-    # Subscribe the address to the list.
-    mlmmj_sub_binary = @configuration['mlmmj']['sub_binary']
-    `#{mlmmj_sub_binary} -L #{list} -a #{addr} -q -f -s`
-    if $CHILD_STATUS.exitstatus.zero?
-      puts 'OK'
-    else
-      puts 'FAILED'
-    end
-  end
-end
-
-def remove_subscriber_from(list_name, list, addr)
-  print "Removing #{addr}... "
-
-  # We ignore this action if the configuration file doesn't say we are allowed
-  # to remove addresses from this list.
-  unless @configuration['lists_remove'].include?(list_name)
-    puts 'IGNORED'
-    return
-  end
-
-  # Unsubscribe the address from the list.
-  mlmmj_unsub_binary = @configuration['mlmmj']['unsub_binary']
-  `#{mlmmj_unsub_binary} -L #{list} -a #{addr} -q -s`
-  if $CHILD_STATUS.exitstatus.zero?
-    puts 'OK'
-  else
-    puts 'FAILED'
-  end
-end
-
-def sync_list(list_name, ldap_group_entry, ldap_conn)
-  mlmmj_basepath = @configuration['mlmmj']['basepath']
-  user_basetree = @configuration['ldap']['users']['basetree']
-  list = "#{mlmmj_basepath}/#{list_name}@#{@configuration['domain']}"
-
-  ldap_members = ldap_group_entry.memberuid.map do |uid|
-    filter = Net::LDAP::Filter.eq('uid', uid)
-    matched_ldap_users = ldap_conn.search(base: user_basetree, filter: filter)
-    if matched_ldap_users.nil? || matched_ldap_users.empty?
-      ""
-    else
-      user = matched_ldap_users.first
-      address = mail.first # 'mail' is an array for some reason.
-
-      address
-    end
-  end
-
-  ldap_members.select! {|e| not e.empty? }
-  puts "Found #{ldap_group_entry.dn} with #{ldap_members.size} members"
-
-  # Extract mail addresses from Mlmmj
-  print 'Searchin mlmmj... '
-  mlmmj_subscribers = get_mlmmj_subscribers(list)
-  puts 'OK'
-  puts "Found #{list_name}@#{@configuration['domain']} with\
- #{mlmmj_subscribers.size} subscribers"
-
-  # Add to the subscribers any missing entry
-  # Remove successful matches
-  ldap_members.each do |addr|
-    add_subscriber_to(list_name, mlmmj_subscribers, list, addr)
-  end
-
-  # Remove remaining "subcribers" (= they did not match with LDAP members)
-  mlmmj_subscribers.each do |addr|
-    remove_subscriber_from(list_name, list, addr)
-  end
-  print "\n"
-end
-
-def main
-  # Parse configuration, bind to LDAP server
-  configuration_file = ARGV[0] ? ARGV[0] : @configuration_file
-  @configuration = read_configuration(configuration_file)
-  ldap_conn = connect_ldap
-
-  domain = @configuration['domain']
-  list_basetree = @configuration['ldap']['lists']['basetree']
-  lists = (@configuration['lists_add'] + @configuration['lists_remove']).uniq
-
-  # Sync Mlmmj lists with LDAP groups
-  lists.each do |list_name|
-    puts ">> Processing list #{list_name}@#{domain}"
-    print 'Searching LDAP... '
-
-    filter = Net::LDAP::Filter.eq('cn', list_name)
-    matched_ldap_groups = ldap_conn.search(base: list_basetree, filter: filter)
-    if matched_ldap_groups.nil? || matched_ldap_groups.empty?
-      # Could not find matching LDAP group
-      puts 'NOT FOUND'
-    else
-      puts 'OK'
-      ldap_group_entry = matched_ldap_groups.first
-      sync_list(list_name, ldap_group_entry, ldap_conn)
-    end
-  end
-end
-
-###
-# Execute script:
-main
diff --git a/mlmmj-ldap-sync.service b/mlmmj-ldap-sync.service
deleted file mode 100644
index ac0ecaf..0000000
--- a/mlmmj-ldap-sync.service
+++ /dev/null
@@ -1,7 +0,0 @@
-[Unit]
-Description=Synchronize mlmmj mailing lists with LDAP groups
-After=network.target
-
-[Service]
-Type=simple
-ExecStart=/usr/bin/mlmmj-ldap-sync
diff --git a/mlmmj-ldap-sync.timer b/mlmmj-ldap-sync.timer
deleted file mode 100644
index 3b99c39..0000000
--- a/mlmmj-ldap-sync.timer
+++ /dev/null
@@ -1,9 +0,0 @@
-[Unit]
-Description=Synchronize mlmmj mailing lists with LDAP groups once a day
-
-[Timer]
-OnCalendar=*-*-* 3:00:00
-Persistent=true
-
-[Install]
-WantedBy=timers.target
diff --git a/mlmmj-ldap-sync@.service b/mlmmj-ldap-sync@.service
deleted file mode 100644
index f1bf483..0000000
--- a/mlmmj-ldap-sync@.service
+++ /dev/null
@@ -1,7 +0,0 @@
-[Unit]
-Description=Synchronize mlmmj mailing lists with LDAP groups
-After=network.target
-
-[Service]
-Type=simple
-ExecStart=/usr/bin/mlmmj-ldap-sync /etc/mlmmj-ldap-sync-%i.toml