note 48897 added to function.mail

I send a email to my mailbox using function mail() nomally in rh9+apache+php environment.but the email is always showing the sender as "apache@xx.xx".how can i fix the problem and custom the sender myself?thx for any help!!! ---- Manual Page -- http://www.php.net/manual/en/function.mail.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+48897 Delete -- http://master.php.net/manage/user-notes.php?action=delete+48897&report=yes Reason: bad code -- http://master.php.net/manage/user-notes.php?action=delete+48897&report=yes&reason=bad+code Reason: spam -- http://master.php.net/manage/user-notes.php?action=delete+48897&report=yes&reason=spam Reason: useless example -- http://master.php.net/manage/user-notes.php?action=delete+48897&report=yes&reason=useless+example Reason: contains commercial links -- http://master.php.net/manage/user-notes.php?action=delete+48897&report=yes&reason=contains+commercial+links Reason: useless note -- http://master.php.net/manage/user-notes.php?action=delete+48897&report=yes&reason=useless+note Reject -- http://master.php.net/manage/user-notes.php?action=reject+48897&report=yes Search -- http://master.php.net/manage/user-notes.php