Sorry, updating your journal via email is not available for your account type.
Although I have these switches in my ljconfig.pl:
$USE_PGP = 1;
$EMAIL_POST_DOMAIN = "post.$DOMAIN";
My account switches are...:
'paid' => 1,
'useremail' => 1,
'styles' => 1,
'userpics' => 30,
'textmessaging' => 1,
'directory' => 1,
'moodthemecreate' => 1,
'userdomain' => 1,
'can_post' => 1,
'synd_quota' => 250,
'makepoll' => 1,
'directory' => 1,
'findsim' => 1,
'weblogscom' => 1,
I looked around for whatever it is I'm missing in the lastest cvs ljconfig.pl and http://www.livejournal.com/admin/ljconfig.pl.txt but I couldn't find anything :-/