diff --git a/inventory/group_vars/all b/inventory/group_vars/all
index d4f9ba7..fc11c01 100644
--- a/inventory/group_vars/all
+++ b/inventory/group_vars/all
@@ -19,6 +19,8 @@ bgp_ipv6_transfer_net: fd37:b4dc:4b1e::/64
 http_domain_internal: ffmwu.org
 http_domain_external: freifunk-mwu.de
 
+mail_domain: freifunk-mwu.de
+
 meshes:
   - id: mz
     site_number: 37
diff --git a/playbooks/gateways.yml b/playbooks/gateways.yml
index fcefd39..bcf224f 100755
--- a/playbooks/gateways.yml
+++ b/playbooks/gateways.yml
@@ -33,3 +33,4 @@
     - service-bind-slave
     - service-respondd
     - service-vnstat
+    - service-nullmailer
diff --git a/roles/service-nullmailer/README.md b/roles/service-nullmailer/README.md
new file mode 100644
index 0000000..59ebfa6
--- /dev/null
+++ b/roles/service-nullmailer/README.md
@@ -0,0 +1,15 @@
+# Ansible role service-nullmailer
+
+Diese Ansible role installiert postfix und konfiguriert diesen als null client.
+
+- schreibt /etc/mailname
+- schreibt /etc/postfix/main.cf
+- setzt root alias in /etc/aliases
+
+## Benötigte Variablen
+
+- Variable `inventory_hostname`
+- Variable `mail_domain` (Gruppen-Variable)
+- Liste `nullmailer_packages` (Rollen-Variable)
+- Variable `nullmailer_relayhost`(Rollen-Variable)
+- Variable `admin_mail_address` (Rollen-Variable)
diff --git a/roles/service-nullmailer/handlers/main.yml b/roles/service-nullmailer/handlers/main.yml
new file mode 100644
index 0000000..b221d8f
--- /dev/null
+++ b/roles/service-nullmailer/handlers/main.yml
@@ -0,0 +1,14 @@
+---
+- name: reload systemd unit postfix
+  systemd:
+    name: postfix
+    state: reloaded
+
+- name: restart systemd unit postfix
+  systemd:
+    name: postfix
+    state: restarted
+
+- name: run postalias
+  command: postalias /etc/aliases
+  changed_when: False
diff --git a/roles/service-nullmailer/tasks/main.yml b/roles/service-nullmailer/tasks/main.yml
new file mode 100644
index 0000000..b43b502
--- /dev/null
+++ b/roles/service-nullmailer/tasks/main.yml
@@ -0,0 +1,32 @@
+---
+- name: install postfix packages
+  package:
+    name: "{{ item }}"
+    state: present
+  with_items: "{{ nullmailer_packages }}"
+
+- name: write /etc/mailname
+  template:
+    src: mailname.j2
+    dest: /etc/mailname
+    mode: 0644
+    owner: root
+    group: root
+  notify: reload systemd unit postfix
+
+- name: configure mail aliases
+  lineinfile:
+    path: /etc/aliases
+    state: present
+    regexp: '^root:'
+    line: "root: {{ admin_mail_address }}"
+  notify: run postalias
+
+- name: write /etc/postfix/main.cf
+  template:
+    src: main.cf.j2
+    dest: /etc/postfix/main.cf
+    mode: 0644
+    owner: root
+    group: root
+  notify: reload systemd unit postfix
diff --git a/roles/service-nullmailer/templates/mailname.j2 b/roles/service-nullmailer/templates/mailname.j2
new file mode 100644
index 0000000..46f839c
--- /dev/null
+++ b/roles/service-nullmailer/templates/mailname.j2
@@ -0,0 +1 @@
+{{ mail_domain }}
diff --git a/roles/service-nullmailer/templates/main.cf.j2 b/roles/service-nullmailer/templates/main.cf.j2
new file mode 100644
index 0000000..beed284
--- /dev/null
+++ b/roles/service-nullmailer/templates/main.cf.j2
@@ -0,0 +1,48 @@
+#
+# {{ ansible_managed }}
+# 
+# See /usr/share/postfix/main.cf.dist for a commented, more complete version
+
+# Debian specific:  Specifying a file name will cause the first
+# line of that file to be used as the name.  The Debian default
+# is /etc/mailname.
+myorigin = /etc/mailname
+
+smtpd_banner = $myhostname ESMTP $mail_name
+biff = no
+
+# appending .domain is the MUA's job.
+append_dot_mydomain = no
+
+# Uncomment the next line to generate "delayed mail" warnings
+#delay_warning_time = 4h
+
+readme_directory = /usr/share/doc/postfix
+
+# See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on
+# fresh installs.
+compatibility_level = 2
+
+# TLS parameters
+smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
+smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
+smtpd_use_tls = yes
+smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
+smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
+smtp_tls_security_level = encrypt
+
+# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
+# information on enabling SSL in the smtp client.
+
+smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
+myhostname = {{ inventory_hostname }}
+alias_maps = hash:/etc/aliases
+alias_database = hash:/etc/aliases
+mydestination =
+relayhost = {{ nullmailer_relayhost }}
+mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
+mailbox_size_limit = 0
+recipient_delimiter = +
+inet_interfaces = loopback-only
+inet_protocols = all
+html_directory = /usr/share/doc/postfix/html
diff --git a/roles/service-nullmailer/vars/main.yml b/roles/service-nullmailer/vars/main.yml
new file mode 100644
index 0000000..2563887
--- /dev/null
+++ b/roles/service-nullmailer/vars/main.yml
@@ -0,0 +1,8 @@
+---
+nullmailer_packages:
+  - postfix
+  - postfix-doc
+  - mailutils
+
+nullmailer_relayhost: "[fd37:b4dc:4b1e::a25:101]"
+admin_mail_address: "admin@lists.freifunk-mwu.de"