problem with sending email from forums

[JeDDaHosT]

Hello,

I have a problem with emails sent from vBulletin forums it doesn't go

this is the error from error_log :

sendmail: Cannot lookup callers gid, referer: http://www.******.net/vb/admincp/email.php?do=start

I have apache2, su_PHP, PHP5.2.5

root@host [~]# php -v
PHP 5.2.5 (cli) (built: Feb  3 2008 23:02:50)
Copyright (c) 1997-2007 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies
    with XCache v1.2.1, Copyright (c) 2005-2007, by mOo
    with the ionCube PHP Loader v3.1.31, Copyright (c) 2002-2007, by ionCube Ltd., and
    with Zend Extension Manager v1.2.0, Copyright (c) 2003-2007, by Zend Technologies
    with Suhosin v0.9.22, Copyright (c) 2007, by SektionEins GmbH
    with Zend Optimizer v3.3.0, Copyright (c) 1998-2007, by Zend Technologies
root@host [~]# httpd -v
Server version: Apache/2.2.8 (Unix)
Server built:   Feb  3 2008 22:27:38
Cpanel::Easy::Apache v3.2.0 rev3802

The problem happened after the last time i made apache update (i was running with the same thing and i didn't had this problem)

I unchecked prevent nobody to send emails and the same thing
i stopped CSF and the same problem !!

Regards,

[useradmin]

http://forums.cpanel.net/f4/apache-2...ody-66879.html