diff --git a/src/postorius/models.py b/src/postorius/models.py
index baf1cef..aee92e0 100644
--- a/src/postorius/models.py
+++ b/src/postorius/models.py
@@ -26,6 +26,7 @@
 from datetime import datetime, timedelta
 from django.conf import settings
 from django.contrib.auth.models import User
+from django.core.exceptions import ImproperlyConfigured
 from django.core.urlresolvers import reverse
 from django.core.mail import send_mail
 from django.db import models
@@ -289,7 +290,16 @@
                 {'activation_link': activation_link, 'host_url': host_url})
         email_subject = getattr(
             settings, 'EMAIL_CONFIRMATION_SUBJECT', u'Confirmation needed')
+        try:
+            sender_address = getattr(settings, 'EMAIL_CONFIRMATION_FROM')
+        except AttributeError:
+            # settings.EMAIL_CONFIRMATION_FROM is not defined, fallback
+            # settings.DEFAULT_EMAIL_FROM as mentioned in the django
+            # docs. At the end just raise a `ImproperlyConfigured` Error.
+            sender_address = getattr(settings, 'DEFAULT_FROM_EMAIL')
+        else:
+            raise ImproperlyConfigured
         send_mail(email_subject,
                   get_template(template_path).render(template_context),
-                  getattr(settings, 'EMAIL_CONFIRMATION_FROM'),
+                  sender_address,
                   [self.email])
diff --git a/src/postorius/templates/postorius/user_address_activation_sent.html b/src/postorius/templates/postorius/user_address_activation_sent.html
index 72cb84f..a369f77 100644
--- a/src/postorius/templates/postorius/user_address_activation_sent.html
+++ b/src/postorius/templates/postorius/user_address_activation_sent.html
@@ -7,4 +7,3 @@
     <h1>{% trans 'Email address activation sent' %}</h1>
     <p>{% trans "A confirmation link has been sent to the email address you submitted. Please check your email account and click on the confirmation link to add this address for your account." %}</p>
 {% endblock main %}
-