Problem:
	I can not login to webmail, although all info have been entered correctly. POP3 account can still be accessed through Outlook. What is the problem ?

If you have root access to your server, you can check PHP configuration file (mostly /etc/php.ini) by typing "vi /etc/php.ini"

Look for folowing line:

session.auto_start = 1

and change it to 0

save and exit

Restart Apache