Then you simply have your username wrong, or you're using a version of 
Horde without the admin menu (anything pre Horde 3.x, i.e. HEAD).

I don't have any realm!



This is my servers.php:



$servers['imap'] = array(

     'name' => 'IMAP Server',

     'server' => 'localhost',

     'protocol' => 'imap/notls',

     'port' => 143,

     'folders' => '',

     'namespace' => '',

     'maildomain' => 'navixchile.com',

     'smtphost' => 'localhost',

     // 'realm' => '',

     'preferred' => ''

);



I commented the realm keyword to make sure it's not taken into account 
(it just gives a warning when logging out).



I tried adding a realm and changed the admin user line to:



conf['auth']['admins'] = array('eelgueta_at_navixchile.com');



But it's the same.

You've configured a realm in imp/config/servers.php. Either drop it, 
or take it into account (it's added to your username).

I've set up a Horde installation using imap as the authentication 
driver. I have no access as an administrator. At least, I see no admin 
menu.



I tried adding the following line:



$conf['auth']['admins'] = array('MY_IMAP_ACCOUNT_NAME');



but nothing changes.



Thanks.