I had to mod the create/mod the hooks.php file for ingo. The key was the euser stuff below, I found no other reference to it anywhere, but it was the soln for me.
/**
* Returns the username/password needed to connect to the transport
* backend.
*
* @param string $driver The driver name (array key from backends.php).
*
* @return mixed If non-array, uses Horde authentication credentials
(DEFAULT). Otherwise, an array with the following keys
* (non-existent keys will use default values):
* - euser: (string; SIEVE ONLY) For the sieve driver, the effective
* user to use.
* - password: (string) Password.
* - username: (string) User name.
*/
public function transport_auth($driver)
{
switch ($driver) {
case 'timsieved':
// // Example #1: Use full Horde username for password.
// return array(
// 'username' => $GLOBALS['registry']->getAuth(null);
// );
//
// // Example #2: Use IMP password/username.
$ob = $GLOBALS['registry']->call('mail/imapOb');
return array(
'password' => $ob->getParam('password'),
'username' => $ob->getParam('username'),
'euser' => $ob->getParam('username')
);
}
//
// // DEFAULT: Use hordeauth (identical to not defining hook at all).
// return true;
}
