diff --git a/manifests/init.pp b/manifests/init.pp
index 5f2ba33..a3838eb 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -21,6 +21,7 @@
 # http://www.exim.org/exim-html-current/doc/html/spec_html/index.html
 
 class exim(
+  $local_domains      = '@',
   $mailman_domains    = [],
   $queue_interval     = '30m',
   $queue_run_max      = '5',
diff --git a/templates/exim4.conf.erb b/templates/exim4.conf.erb
index 57f5db1..21e1c40 100644
--- a/templates/exim4.conf.erb
+++ b/templates/exim4.conf.erb
@@ -56,8 +56,7 @@ CONFDIR = <%= scope.lookupvar('exim::params::conf_dir') %>
 # +local_domains, +relay_to_domains, and +relay_from_hosts, respectively. They
 # are all colon-separated lists:
 
-domainlist local_domains = @<% if @mailman_domains.length > 0 -%>:<%= @mailman_domains.join(":") %><% end -%>
-
+domainlist local_domains = <%= @local_domains %><% if @mailman_domains.length > 0 -%>:<%= @mailman_domains.join(":") %><% end -%>
 domainlist relay_to_domains =
 hostlist   relay_from_hosts = 127.0.0.1