Please edit this file:
Comment: $conf['mailer']['type'] = 'smtp';
Please use "setquota" system command for changing quota.
1. If you have any firewall is enabled then will try to disable it.
2. Please try to set up IP address instead of "localhost", like...
Please use this command for changing IP completely.
mysql -uadmin -p`cat /etc/psa/.psa.shadow` -D psa -e"update misc set...
Separate names with a comma.