[horde] Login problems with Horde/IMP [solution for me]

[frank@sagurna.de]

I found the solution for my problem.

Our server http://zm01/ sets the cookie _without_ domain=zm01
Horde sets the cookie with domain=his for http://his/horde .
Setting 

$conf['cookie']['domain'] = ''; 

helps.
Firefox now accepts the cookie.

Regards
Frank