diff --git a/etc/storyboard.conf.sample b/etc/storyboard.conf.sample
index df30bfcc..eb2c149b 100644
--- a/etc/storyboard.conf.sample
+++ b/etc/storyboard.conf.sample
@@ -168,6 +168,9 @@ lock_path = $state_path/lock
 # The email address of the Reply-To header (optional).
 # reply_to =
 
+# The default url base to use in emails, if Referer is not set.
+# default_url = https://storyboard.openstack.org/
+
 # The SMTP server to use.
 # smtp_host = localhost
 
diff --git a/storyboard/plugin/email/__init__.py b/storyboard/plugin/email/__init__.py
index 1d3b54b6..415fb140 100644
--- a/storyboard/plugin/email/__init__.py
+++ b/storyboard/plugin/email/__init__.py
@@ -33,6 +33,9 @@ PLUGIN_OPTS = [
     cfg.StrOpt("reply_to",
                default=None,
                help="The email address of the Reply-To header (optional)."),
+    cfg.StrOpt("default_url",
+               default=None,
+               help="The default/fallback url base to use in emails."),
     cfg.StrOpt("smtp_host",
                default='localhost',
                help="The SMTP server to use."),
diff --git a/storyboard/plugin/email/workers.py b/storyboard/plugin/email/workers.py
index 444113a8..b1bab7ac 100644
--- a/storyboard/plugin/email/workers.py
+++ b/storyboard/plugin/email/workers.py
@@ -282,6 +282,10 @@ class SubscriptionEmailWorker(EmailWorkerBase):
         if email_config.reply_to:
             factory.add_header('Reply-To', email_config.reply_to)
 
+        # If there is a fallback URL configured, use it if needed
+        if email_config.default_url and url is None:
+            url = email_config.default_url
+
         # Resolve the resource instance
         resource_instance = self.resolve_resource_by_name(session, resource,
                                                           resource_id)