implement mail address deletion

- implement managemails.views.DeleteMailAddress
- add get_context_data to AddMailAddress to add customer to template context
- add URL pattern 'delete_mailaddress' to managemails.urls
- add template hostingpackages/customerhostingpackage_detail.html
- add entry to changelog

gnuviechadmin/managemails/views.py

@@ -9,6 +9,7 @@ from django.shortcuts import get_object_or_404, redirect
 from django.utils.translation import ugettext as _
 from django.views.generic.edit import (
     CreateView,
+    DeleteView,
     UpdateView,
 )
 from django.contrib import messages
@@ -137,6 +138,11 @@ class AddMailAddress(
     model = MailAddress
     template_name_suffix = '_create'
 
+    def get_context_data(self, **kwargs):
+        context = super(AddMailAddress, self).get_context_data(**kwargs)
+        context['customer'] = self.get_customer_object()
+        return context
+
     def get_maildomain(self):
         return get_object_or_404(MailDomain, domain=self.kwargs['domain'])
 
@@ -156,3 +162,29 @@ class AddMailAddress(
                 mailaddress=address)
         )
         return redirect(self.get_hosting_package())
+
+
+class DeleteMailAddress(
+    HostingPackageAndCustomerMixin, StaffOrSelfLoginRequiredMixin, DeleteView
+):
+    """
+    This view is used to delete a mail address.
+
+    """
+    context_object_name = 'mailaddress'
+    model = MailAddress
+
+    def get_maildomain(self):
+        return get_object_or_404(MailDomain, domain=self.kwargs['domain'])
+
+    def get_context_data(self, **kwargs):
+        context = super(DeleteMailAddress, self).get_context_data(**kwargs)
+        context.update({
+            'customer': self.get_customer_object(),
+            'hostingpackage': self.get_hosting_package(),
+            'maildomain': self.get_maildomain(),
+        })
+        return context
+
+    def get_success_url(self):
+        return self.get_hosting_package().get_absolute_url()