Whenever I turn on greylisting the GUI hangs. I waited for an hour already and it still hangs. When I click elsewhere and return it seems the setting was made. I have attached an image. Unfortunately on the image you won't see it because when I press Print Scrn on Ubuntu the hour glass turns to a pointer. When I turn if off, the CPU shoots up for 10 minutes and then stops. If I turn it on, the CPU idles. Which log can I examine to trace the problem further? How will I know if it was a success? This problem did not occur before I had version 9.5.3 now I have 9.5.4. Statistics Plesk 9.5.4 Ubuntu 8.04 LTS 64-bit 2332 Domains 914 Client accounts 5244 E-mail addresses I also have this Expand patch: http://download1.parallels.com/Ples...nel-9.5-plesk-expand-patch-release-notes.html which is new.