[imp] Still having custom_login.php problems

[Curt LeCaptain]

I know I've asked quite a few times, and I've been doing a lot of 
searching on Google and on the IMP mailing list in the past, and I still 
can't find out what *

**Notice*: Undefined index: mail.itol.com in 
*/data/www/docs/newwebmail.itol.com/horde/imp/scripts/custom_login.php* 
on line *18

*that error means. 

I know that this line:
$server_key = 'localhost';

Has something to do with it, but I'm completely unsure as to what that 
line should be set to to make this work.  Any help would be appriciated.

Curt LeCaptain