diff --git a/jdav_web/mailer/models.py b/jdav_web/mailer/models.py
index 49e40a3..2969ad5 100644
--- a/jdav_web/mailer/models.py
+++ b/jdav_web/mailer/models.py
@@ -30,9 +30,11 @@ class Message(models.Model):
                     continue
                 members.add(member)
         data = [
-            (self.subject, self.content, self.from_addr, [member.email])
+            (self.subject, get_content(self.content), self.from_addr,
+             [member.email])
             for member in members
         ]
+        print("data to be sent", data)
         send_mass_mail(data)
         self.sent = True
         self.save()
@@ -43,3 +45,13 @@ class Message(models.Model):
         permissions = (
             ("submit_mails", _("Can submit mails")),
         )
+
+
+def get_content(content):
+    # TODO: generate right url here
+    url = "work in progress"
+    text = "{}\n\nDiese Email wurde über die Webseite der JDAV Ludwigsburg"\
+        "verschickt. Wenn du in Zukunft keine Emails mehr erhalten möchtest,"\
+        "kannst du hier den Newsletter deabonnieren.\n\n{}"\
+        .format(content, url)
+    return text
diff --git a/jdav_web/members/models.py b/jdav_web/members/models.py
index d2fcf42..0a29463 100644
--- a/jdav_web/members/models.py
+++ b/jdav_web/members/models.py
@@ -1,4 +1,5 @@
 from datetime import datetime
+import hashlib
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 
@@ -33,11 +34,18 @@ class Member(models.Model):
     group = models.ManyToManyField(Group)
     gets_newsletter = models.BooleanField(_('receives newsletter'),
                                           default=True)
+    key = models.CharField(max_length=32, default="")
 
     def __str__(self):
         """String representation"""
         return self.name
 
+    def save(self, *args, **kwargs):
+        if len(self.key) == 0:
+            self.key = hashlib.md5((self.prename + self.lastname +
+                                    self.email).encode()).hexdigest()
+        super(Member, self).save(*args, **kwargs)
+
     @property
     def name(self):
         """Returning whole name (prename + lastname)"""