i set postfix and dovecot today, as to send mail thru php
this is what happened:

jorge@jorgia:~$ service apache2 restart
 * Restarting web server apache2                                                              ulimit: 88: error setting limit (Operation not permitted)
apache2: Could not reliably determine the server's fully qualified domain name, using 192.168.0.8 for ServerName
ulimit: 88: error setting limit (Operation not permitted)
apache2: Could not reliably determine the server's fully qualified domain name, using 192.168.0.8 for ServerName
(13)Permission denied: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
Action 'start' failed.
The Apache error log may have more information.