old_contents: # -*- encoding: utf-8 -*-
  ##############################################################################
  #
  #    OpenERP, Open Source Management Solution
  #    Copyright (C) 2011 Smile (<http://www.smile.fr>). All Rights Reserved
  #
  #    This program is free software: you can redistribute it and/or modify
  #    it under the terms of the GNU General Public License as published by
  #    the Free Software Foundation, either version 3 of the License, or
  #    (at your option) any later version.
  #
  #    This program is distributed in the hope that it will be useful,
  #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #    GNU General Public License for more details.
  #
  #    You should have received a copy of the GNU General Public License
  #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  #
  ##############################################################################
  
  from openerp import models, tools
  from openerp.addons.base.ir.ir_mail_server import _logger
  
  
  class IrMailServer(models.Model):
      _inherit = "ir.mail_server"
  
      def send_email(self, cr, uid, message, mail_server_id=None, smtp_server=None, smtp_port=None,
                     smtp_user=None, smtp_password=None, smtp_encryption=None, smtp_debug=False,
                     context=None):
          if not tools.config.get('enable_email_sending'):
              _logger.warning('Email sending not enable')
              return True
          return super(IrMailServer, self).send_email(cr, uid, message, mail_server_id, smtp_server,
                                                      smtp_port, smtp_user, smtp_password, smtp_encryption,
                                                      smtp_debug, context)
  
new_contents: # -*- encoding: utf-8 -*-
  ##############################################################################
  #
  #    OpenERP, Open Source Management Solution
  #    Copyright (C) 2011 Smile (<http://www.smile.fr>). All Rights Reserved
  #
  #    This program is free software: you can redistribute it and/or modify
  #    it under the terms of the GNU General Public License as published by
  #    the Free Software Foundation, either version 3 of the License, or
  #    (at your option) any later version.
  #
  #    This program is distributed in the hope that it will be useful,
  #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #    GNU General Public License for more details.
  #
  #    You should have received a copy of the GNU General Public License
  #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  #
  ##############################################################################
  
  from openerp import models, tools
  from openerp.addons.base.ir.ir_mail_server import _logger
  
  
  class IrMailServer(models.Model):
      _inherit = "ir.mail_server"
  
      def send_email(self, cr, uid, message, mail_server_id=None, smtp_server=None, smtp_port=None,
                     smtp_user=None, smtp_password=None, smtp_encryption=None, smtp_debug=False,
                     context=None):
          if not tools.config.get('enable_email_sending'):
              _logger.warning('Email sending not enable')
              return False
          return super(IrMailServer, self).send_email(cr, uid, message, mail_server_id, smtp_server,
                                                      smtp_port, smtp_user, smtp_password, smtp_encryption,
                                                      smtp_debug, context)
  
subject: Improve IrMailServer.send_email to avoid to consider email as sent