diff --git a/app/models/environment.rb b/app/models/environment.rb
index 3c0e7cc..b1afae4 100644
--- a/app/models/environment.rb
+++ b/app/models/environment.rb
@@ -123,7 +123,7 @@ class Environment < ActiveRecord::Base
   # only one environment can be the default one
   validates_uniqueness_of :is_default, :if => (lambda do |environment| environment.is_default? end), :message => _('Only one Virtual Community can be the default one')
 
-  validates_format_of :contact_email, :with => Noosfero::Constants::EMAIL_FORMAT
+  validates_format_of :contact_email, :with => Noosfero::Constants::EMAIL_FORMAT, :if => (lambda { |record| ! record.contact_email.nil? })
 
   # #################################################
   # Business logic in general
@@ -139,4 +139,12 @@ class Environment < ActiveRecord::Base
     Category.top_level_for(self)
   end
 
+  def default_hostname
+    if self.domains(true).empty?
+      nil
+    else
+      self.domains.find(:first, :order => 'id').name
+    end
+  end
+
 end
--
libgit2 0.21.2