the first error:
Warning: set_time_limit() [function.set-time-limit]: Cannot set time limit in safe mode in /var/www/vhosts/proxee.com/httpdocs/confirm.php on line 238
is the case of the headers already sent errors. This error is occurring because your host has turned safe Mode on in the php.ini file. Universal Email will not work on a server with Safe mode turned on.
With safe mode turned on, a number of php function that are used by universal email, such as set_time_limit(), are disabled.
safe mode will need to be turned off for Universal Email to work.