diff --git a/pyBuchaktion/admin.py b/pyBuchaktion/admin.py
index f466f06..b167de1 100644
--- a/pyBuchaktion/admin.py
+++ b/pyBuchaktion/admin.py
@@ -214,6 +214,7 @@ def export(self, request, queryset):
     # The admin action for rejecting all selected orders at once.
     def reject_selected(self, request, queryset):
         if request.POST.get('_proceed'):
+            errors = []
             hint = request.POST.get('hint')
             sendmails = '_sendmails' in request.POST
             for order in queryset:
@@ -222,7 +223,18 @@ def reject_selected(self, request, queryset):
                 order.save()
                 if sendmails:
                     email = OrderRejectedMessage(order)
-                    email.send()
+                    try:
+                        email.send()
+                    except Exception:
+                        errors += [order.student.email]
+            if len(errors) > 0:
+                context = dict(
+                    self.admin_site.each_context(request),
+                    title=_("Errors"),
+                    intro=_("The following emails could not be sent"),
+                    errors=errors
+                )
+                return TemplateResponse(request, 'pyBuchaktion/admin/order_error.html', context)
         elif not request.POST.get('_cancel'):
             context = dict(
                 self.admin_site.each_context(request),
@@ -240,6 +252,7 @@ def reject_selected(self, request, queryset):
     # The admin action for marking all selected orders as arrived.
     def mark_arrived_selected(self, request, queryset):
         if request.POST.get('_proceed'):
+            errors=[]
             sendmails = '_sendmails' in request.POST
             hint = request.POST.get('hint', "")
             for order in queryset:
@@ -248,7 +261,18 @@ def mark_arrived_selected(self, request, queryset):
                 order.save()
                 if sendmails:
                     email = OrderArrivedMessage(order)
-                    email.send()
+                    try:
+                        email.send()
+                    except Exception:
+                        errors += [order.student.email]
+            if len(errors) > 0:
+                context = dict(
+                    self.admin_site.each_context(request),
+                    title=_("Errors"),
+                    intro=_("The following emails could not be sent"),
+                    errors=errors
+                )
+                return TemplateResponse(request, 'pyBuchaktion/admin/order_error.html', context)
         elif not request.POST.get('_cancel'):
             context = dict(
                 self.admin_site.each_context(request),
@@ -266,6 +290,7 @@ def mark_arrived_selected(self, request, queryset):
     # The admin action for ordering the selected books
     def order_selected(self, request, queryset):
         if request.POST.get('_proceed'):
+            errors=[]
             sendmails = '_sendmails' in request.POST
             hint = request.POST.get('hint', "")
             for order in queryset:
@@ -274,12 +299,16 @@ def order_selected(self, request, queryset):
                 order.save()
                 if sendmails:
                     email = OrderAcceptedMessage(order)
-                    email.send()
+                    try:
+                        email.send()
+                    except Exception:
+                        errors += [order.student.email]
             context = dict(
                 self.admin_site.each_context(request),
                 title=_("Ordering: CSV-Export"),
                 queryset=queryset,
                 opts=self.opts,
+                errors=[],
                 action_checkbox_name=helpers.ACTION_CHECKBOX_NAME,
             )
             return TemplateResponse(request, 'pyBuchaktion/admin/order_order_selected_csv.html', context)
diff --git a/pyBuchaktion/models.py b/pyBuchaktion/models.py
index 1d9752b..20e5111 100644
--- a/pyBuchaktion/models.py
+++ b/pyBuchaktion/models.py
@@ -104,7 +104,11 @@ class Book(models.Model):
 
     # The default string output for a book as "<title> (<author>) [ISBN: <isbn>)"
     def __str__(self):
-        return '%s (%s) [ISBN: %s]' % (self.title, self.author, mask(self.isbn_13))
+        try:
+            isbn = mask(self.isbn_13)
+        except Exception:
+            isbn = self.isbn_13
+        return '%s (%s) [ISBN: %s]' % (self.title, self.author, isbn)
 
     # Get the name of the current state from the options
     def statename(self):
diff --git a/pyBuchaktion/templates/pyBuchaktion/admin/order_error.html b/pyBuchaktion/templates/pyBuchaktion/admin/order_error.html
new file mode 100644
index 0000000..c85807f
--- /dev/null
+++ b/pyBuchaktion/templates/pyBuchaktion/admin/order_error.html
@@ -0,0 +1,9 @@
+{% extends "pyBuchaktion/admin/admin_action_page.html" %}
+{% load i18n l10n %}
+
+{% block content %}
+    {% if len(errors) > 0 %}
+        <p>{{ intro }}</p>
+        <ul>{{ errors|unordered_list }}</ul>
+    {% endif %}
+{% endblock %}
\ No newline at end of file
diff --git a/pyBuchaktion/templates/pyBuchaktion/admin/order_order_selected_csv.html b/pyBuchaktion/templates/pyBuchaktion/admin/order_order_selected_csv.html
index cf9b851..31f65c0 100644
--- a/pyBuchaktion/templates/pyBuchaktion/admin/order_order_selected_csv.html
+++ b/pyBuchaktion/templates/pyBuchaktion/admin/order_order_selected_csv.html
@@ -3,6 +3,10 @@
 
 {% block content %}
 <form action="" method="post">{% csrf_token %}
+    {% if errors|length > 0 %}
+    <h4>{% trans "E-Mails that failed to send" %}</h4>
+    <ul>{{ errors|unordered_list }}</ul>
+    {% endif %}
     <p>{% trans "Copy the following list into the bulk-order mask at net-library!" %}</p>
     <textarea name="hint" rows="{{ queryset|length|add:1 }}">{{ queryset|net_csv }}</textarea><br/><br/>
     <div>
diff --git a/tucan-export/tucan-export.py b/tucan-export/tucan-export.py
index d30cd08..abade08 100755
--- a/tucan-export/tucan-export.py
+++ b/tucan-export/tucan-export.py
@@ -24,8 +24,10 @@
 GOOGLE_BOOKS_BASE_PATH = '/books/v1/volumes?'
 # CSS Selectors.
 TUCAN_CC_SELECTOR = '#pageTopNavi ul a'
-TUCAN_DEPT_SELECTOR = '#auditRegistration_list li[title="Dept. 20 - Computer Science"] a'
+#TUCAN_DEPT_SELECTOR = '#auditRegistration_list li[title="Dept. 20 - Computer Science"] a'
+TUCAN_DEPT_SELECTOR = '#auditRegistration_list li[title="FB20 - Informatik"] a'
 # TUCAN_DEPT_SELECTOR = '#auditRegistration_list li[title="FB04 - Mathematik"] a'
+
 TUCAN_MODULE_CONTAINER_SELECTOR = '#auditRegistration_list li a'
 TUCAN_BREADCRUMBS_SELECTOR = '.pageElementTop > h2 > a'
 TUCAN_MODULE_COURSE_IDNAME_SELECTOR = '#pageContent form h1';