diff --git a/app/controllers/hosts_controller.rb b/app/controllers/hosts_controller.rb
index e2aa742..d3dee99 100644
--- a/app/controllers/hosts_controller.rb
+++ b/app/controllers/hosts_controller.rb
@@ -1,113 +1,114 @@
 class HostsController < ApplicationController
   before_action :require_logged_in
   before_action :fetch_host, only: [:show, :edit, :update, :destroy, :submit_config,
                                     :revoke, :disable]
   before_action :fetch_hosts_of_user, only: [:new, :edit, :create]
 
   # GET /hosts/new
   def new
     @host = Host.new
     @host.port = 9102
   end
 
   # POST /hosts
   def create
     @host = Host.new(fetch_params)
 
     @host.verified = current_user.needs_host_list?
 
     if user_can_add_this_host? && @host.save
       flash[:success] = 'Host created successfully'
       current_user.hosts << @host
+      UserMailer.notify_admin(current_user, @host.fqdn).deliver
       redirect_to host_path @host
     else
       flash[:error] = 'Host was not created'
       render :new
     end
   end
 
   # GET /hosts/1
   def show
     @schedules = @host.job_templates.map(&:schedule)
     @filesets = @host.job_templates.map(&:fileset)
   end
 
   # GET /hosts/1/edit
   def edit; end
 
   # PATCH /hosts/1
   def update
     updates = fetch_params.slice(:port, :password)
     if updates.present? && @host.update_attributes(updates)
       @host.recalculate if @host.bacula_ready?
       flash[:success] = 'Host updated successfully. You must update your file deamon accordingly.'
       redirect_to host_path @host
     else
       render :edit
     end
   end
 
   # DELETE /hosts/1
   def destroy
     if @host.destroy
       flash[:success] = 'Host destroyed successfully'
     else
       flash[:error] = 'Host not destroyed'
     end
 
     redirect_to root_path
   end
 
   # POST /hosts/1/disable
   def disable
     if @host.disable_jobs_and_update
       flash[:success] = 'Client disabled'
     else
       flash[:error] = 'Something went wrong, try again later'
     end
 
     redirect_to host_path(@host)
   end
 
   # POST /hosts/1/submit_config
   def submit_config
     if @host.dispatch_to_bacula
       flash[:success] = 'Host configuration sent to Bacula successfully'
     else
       flash[:error] = 'Something went wrong, try again later'
     end
 
     redirect_to host_path(@host)
   end
 
   # DELETE /hosts/1/revoke
   def revoke
     if @host.remove_from_bacula
       flash[:success] = 'Host configuration removed from Bacula successfully'
     else
       flash[:error] = 'Something went wrong, try again later'
     end
 
     redirect_to root_path
   end
 
   private
 
   def fetch_hosts_of_user
     return if not current_user.needs_host_list?
 
     @hosts_of_user = session[:vms] - current_user.hosts.pluck(:fqdn)
   end
 
   def fetch_host
     @host = current_user.hosts.includes(job_templates: [:fileset, :schedule]).find(params[:id])
   end
 
   def fetch_params
     params.require(:host).permit(:fqdn, :port, :password)
   end
 
   def user_can_add_this_host?
     !current_user.needs_host_list? || @hosts_of_user.include?(@host.fqdn)
   end
 end
diff --git a/app/mailers/user_mailer.rb b/app/mailers/user_mailer.rb
index 0102de0..bd51c31 100644
--- a/app/mailers/user_mailer.rb
+++ b/app/mailers/user_mailer.rb
@@ -1,14 +1,24 @@
 class UserMailer < ActionMailer::Base
   default from: Archiving.settings[:default_sender]
 
   # Notifies the host's owners that the host has been verified by an admin
   # and is now ready to be configured
   #
   # @param user_emails[Array] the owners' emails
   # @param host[String] the host's FQDN
   def notify_for_verification(user_emails, host)
     @host = host
     s = "[Archiving] Host #{host} verification"
     mail(to: user_emails, subject: s)
   end
+
+  # Notifies admin about a new host that needs verification
+  #
+  # @param user[User] the user that created the host
+  # @param host[String] the host's FQDN
+  def notify_admin(user, host)
+    @user = user
+    @host = host
+    mail(to: Archiving.settings[:admin_email], subject: 'New host pending verification')
+  end
 end
diff --git a/app/views/user_mailer/notify_admin.text.erb b/app/views/user_mailer/notify_admin.text.erb
new file mode 100644
index 0000000..96f84fe
--- /dev/null
+++ b/app/views/user_mailer/notify_admin.text.erb
@@ -0,0 +1,9 @@
+New Host pending admin approval.
+
+user: <%= @user.username %> <%= admin_user_url(@user.id) %>
+host <%= @host %>
+
+<%= unverified_admin_hosts_url %>
+
+---------
+Archiving
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 9911314..d722fda 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -1,41 +1,43 @@
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
   # In the development environment your application's code is reloaded on
   # every request. This slows down response time but is perfect for development
   # since you don't have to restart the web server when you make code changes.
   config.cache_classes = false
 
   # Do not eager load code on boot.
   config.eager_load = false
 
   # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false
 
   # Don't care if the mailer can't send.
   config.action_mailer.raise_delivery_errors = false
 
   # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log
 
   # Raise an error on page load if there are pending migrations.
   config.active_record.migration_error = :page_load
 
   # Debug mode disables concatenation and preprocessing of assets.
   # This option may cause significant delays in view rendering with a large
   # number of complex assets.
   config.assets.debug = true
 
   # Adds additional error checking when serving assets at runtime.
   # Checks for improperly declared sprockets dependencies.
   # Raises helpful error messages.
   config.assets.raise_runtime_errors = true
 
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
 
   config.action_mailer.delivery_method = :smtp
   config.action_mailer.smtp_settings =
     YAML::load(File.open("#{Rails.root}/config/mailer.yml"))[Rails.env].symbolize_keys
+
+  routes.default_url_options = { host: '127.0.0.1', port: '3000' }
 end
diff --git a/config/environments/production.rb b/config/environments/production.rb
index a24c97d..3c59f0a 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -1,82 +1,84 @@
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
   # Code is not reloaded between requests.
   config.cache_classes = true
 
   # Eager load code on boot. This eager loads most of Rails and
   # your application in memory, allowing both threaded web servers
   # and those relying on copy on write to perform better.
   # Rake tasks automatically ignore this option for performance.
   config.eager_load = true
 
   # Full error reports are disabled and caching is turned on.
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = true
 
   # Enable Rack::Cache to put a simple HTTP cache in front of your application
   # Add `rack-cache` to your Gemfile before enabling this.
   # For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
   # config.action_dispatch.rack_cache = true
 
   # Disable Rails's static asset server (Apache or nginx will already do this).
   config.serve_static_assets = false
 
   # Compress JavaScripts and CSS.
   config.assets.js_compressor = :uglifier
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.
   config.assets.compile = false
 
   # Generate digests for assets URLs.
   config.assets.digest = true
 
   # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb
 
   # Specifies the header that your server uses for sending files.
   # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
   # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
 
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true
 
   # Set to :debug to see everything in the log.
   config.log_level = :info
 
   # Prepend all log lines with the following tags.
   # config.log_tags = [ :subdomain, :uuid ]
 
   # Use a different logger for distributed setups.
   # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
 
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.action_controller.asset_host = "http://assets.example.com"
 
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
   # config.action_mailer.raise_delivery_errors = false
 
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
   # the I18n.default_locale when a translation cannot be found).
   config.i18n.fallbacks = true
 
   # Send deprecation notices to registered listeners.
   config.active_support.deprecation = :notify
 
   # Disable automatic flushing of the log to improve performance.
   # config.autoflush_log = false
 
   # Use default logging formatter so that PID and timestamp are not suppressed.
   config.log_formatter = ::Logger::Formatter.new
 
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
 
   config.action_mailer.delivery_method = :test
   config.action_mailer.smtp_settings =
     YAML::load(File.open("#{Rails.root}/config/mailer.yml"))[Rails.env].symbolize_keys
+
+  routes.default_url_options = { host: 'archiving.grnet.gr' }
 end
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 053f5b6..47fefbb 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -1,39 +1,40 @@
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
   # The test environment is used exclusively to run your application's
   # test suite. You never need to work with it otherwise. Remember that
   # your test database is "scratch space" for the test suite and is wiped
   # and recreated between test runs. Don't rely on the data there!
   config.cache_classes = true
 
   # Do not eager load code on boot. This avoids loading your whole application
   # just for the purpose of running a single test. If you are using a tool that
   # preloads Rails for running tests, you may have to set it to true.
   config.eager_load = false
 
   # Configure static asset server for tests with Cache-Control for performance.
   config.serve_static_assets  = true
   config.static_cache_control = 'public, max-age=3600'
 
   # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false
 
   # Raise exceptions instead of rendering exception templates.
   config.action_dispatch.show_exceptions = false
 
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false
 
   # Tell Action Mailer not to deliver emails to the real world.
   # The :test delivery method accumulates sent emails in the
   # ActionMailer::Base.deliveries array.
   config.action_mailer.delivery_method = :test
 
   # Print deprecation notices to the stderr.
   config.active_support.deprecation = :stderr
 
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
+  routes.default_url_options = { host: '127.0.1.1' }
 end
diff --git a/config/initializers/00_settings.rb b/config/initializers/00_settings.rb
index 7f889dd..d0ff3be 100644
--- a/config/initializers/00_settings.rb
+++ b/config/initializers/00_settings.rb
@@ -1,8 +1,9 @@
 Archiving.settings director_name: YAML.load_file(Rails.root.join('config', 'bacula.yml'))[Rails.env].
   symbolize_keys[:director]
 
 Archiving.settings vima_oauth_enabled: true
 Archiving.settings institutional_authentication_enabled: true
 Archiving.settings okeanos_authentication_enabled: false
 
 Archiving.settings default_sender: 'admin@archiving.grnet.gr'
+Archiving.settings admin_email: 'admin@archiving.grnet.gr'