diff --git a/jdav_web/contrib/templatetags/common.py b/jdav_web/contrib/templatetags/common.py
new file mode 100644
index 0000000..4e2b350
--- /dev/null
+++ b/jdav_web/contrib/templatetags/common.py
@@ -0,0 +1,9 @@
+from django import template
+from django.conf import settings
+
+register = template.Library()
+
+# settings value
+@register.simple_tag
+def settings_value(name):
+    return getattr(settings, name, "")
diff --git a/jdav_web/logindata/templates/logindata/register_failed.html b/jdav_web/logindata/templates/logindata/register_failed.html
index b04b8f9..5484579 100644
--- a/jdav_web/logindata/templates/logindata/register_failed.html
+++ b/jdav_web/logindata/templates/logindata/register_failed.html
@@ -1,6 +1,5 @@
 {% extends "members/base.html" %}
-{% load i18n %}
-{% load static %}
+{% load i18n static common %}
 
 {% block title %}
 {% trans "Registration" %}
@@ -12,6 +11,6 @@
 
 <p>{% trans "Something went wrong. The registration key is invalid or has expired." %}</p>
 
-<p>{% trans "If you think this is a mistake, please" %} <a href="mailto:jugendreferent@jdav-hd.de">{% trans "contact us." %}</a></p>
+<p>{% trans "If you think this is a mistake, please" %} <a href="mailto:{% settings_value 'RESPONSIBLE_MAIL' %}">{% trans "contact us." %}</a></p>
 
 {% endblock %}
diff --git a/jdav_web/members/templates/members/echo_failed.html b/jdav_web/members/templates/members/echo_failed.html
index f65550f..be66343 100644
--- a/jdav_web/members/templates/members/echo_failed.html
+++ b/jdav_web/members/templates/members/echo_failed.html
@@ -1,6 +1,5 @@
 {% extends "members/base.html" %}
-{% load i18n %}
-{% load static %}
+{% load i18n static common %}
 
 {% block title %}
 {% trans "Echo failed" %}
@@ -12,6 +11,7 @@
 
 <p><b>{% trans "Something went wrong. The key you supplied is" %} {{ reason }}.</b></p>
 
-<p>{% trans "If you think this is a mistake, please" %} <a href="mailto:jugendreferent@jdav-hd.de">{% trans "contact us." %}</a></p>
+<p>{% trans "If you think this is a mistake, please" %}
+<a href="mailto:{% settings_value 'RESPONSIBLE_MAIL' %}">{% trans "contact us." %}</a></p>
 
 {% endblock %}
diff --git a/jdav_web/members/templates/members/invited_registration_failed.html b/jdav_web/members/templates/members/invited_registration_failed.html
index a68a610..393307f 100644
--- a/jdav_web/members/templates/members/invited_registration_failed.html
+++ b/jdav_web/members/templates/members/invited_registration_failed.html
@@ -1,6 +1,5 @@
 {% extends "members/base.html" %}
-{% load i18n %}
-{% load static %}
+{% load i18n static common %}
 
 {% block title %}
 {% trans "Registration failed" %}
@@ -12,6 +11,6 @@
 
 <p><b>{% trans "Something went wrong. The key you supplied is" %} {{ reason }}.</b></p>
 
-<p>{% trans "If you think this is a mistake, please" %} <a href="mailto:jugendreferent@jdav-hd.de">{% trans "contact us." %}</a></p>
+<p>{% trans "If you think this is a mistake, please" %} <a href="mailto:{% settings_value 'RESPONSIBLE_MAIL' %}">{% trans "contact us." %}</a></p>
 
 {% endblock %}
diff --git a/jdav_web/members/templates/members/register_failed.html b/jdav_web/members/templates/members/register_failed.html
index 92b4319..c1371c8 100644
--- a/jdav_web/members/templates/members/register_failed.html
+++ b/jdav_web/members/templates/members/register_failed.html
@@ -1,6 +1,5 @@
 {% extends "members/base.html" %}
-{% load i18n %}
-{% load static %}
+{% load i18n static common %}
 
 {% block title %}
 {% trans "Registration failed" %}
@@ -12,6 +11,7 @@
 
 <p><b>{% trans "Something went wrong while processing your registration." %}</b></p>
 
-<p>{% trans "If you think this is a mistake, please" %} <a href="mailto:jugendreferent@jdav-hd.de">{% trans "contact us." %}</a></p>
+<p>{% trans "If you think this is a mistake, please" %}
+<a href="mailto:{% settings_value 'RESPONSIBLE_MAIL' %}">{% trans "contact us." %}</a></p>
 
 {% endblock %}
diff --git a/jdav_web/templates/admin/index.html b/jdav_web/templates/admin/index.html
index e498037..5ee62a8 100644
--- a/jdav_web/templates/admin/index.html
+++ b/jdav_web/templates/admin/index.html
@@ -1,5 +1,5 @@
 {% extends "admin/index.html" %}
-{% load i18n static %}
+{% load i18n static common %}
 
 {% block content %}
 
@@ -67,7 +67,7 @@ Hier siehst du alle von dir geleiteten Ausfahrten.
 <table>
     <tr>
         <td>
-            <a href="https://nc.cloud-jdav-hd.de/">Nextcloud</a>
+            <a href="{% settings_value 'CLOUD_LINK' %}">Nextcloud</a>
         </td>
         <td>
             Hier liegen Vorlagen für Formulare und nützliche Handbücher.
@@ -75,7 +75,7 @@ Hier siehst du alle von dir geleiteten Ausfahrten.
     </tr>
     <tr>
         <td>
-            <a href="https://dav360.de">DAV 360</a>
+            <a href="{% settings_value 'DAV_360_LINK' %}">DAV 360</a>
         </td>
         <td>
             Zugriff zu Online Office, Teams und deinem DAV Mailaccount.
@@ -83,7 +83,7 @@ Hier siehst du alle von dir geleiteten Ausfahrten.
     </tr>
     <tr>
         <td>
-            <a href="https://davbgs.sharepoint.com/sites/S-114-O-JDAV-Jugendreferat">Julei-Wiki</a>
+            <a href="{% settings_value 'WIKI_LINK' %}">Julei-Wiki</a>
         </td>
         <td>
             Informationen zum Jugendleiter:in-sein.