Disable mail and cron's when restoring a backup of a production database

TURN OFF:
update ir_mail_server set active = 'f'; 
update fetchmail_server set active = 'f';
update ir_cron set active = 'f' where function = 'schedule_backup';

TURN ON:
update ir_mail_server set active = 't'; 
update fetchmail_server set active = 't';
update ir_cron set active = 't' where function = 'schedule_backup';