outland88 - 3:29 am on Aug 12, 2008 (gmt 0)
I had wondered why hackers for the past two months were looking for Plesk and Horde when it was not a part of any set-up I was involved in, so I checked about a month ago. What was happening is my hosting company was extending a Plesk option on new accounts and as you say they apparently do use Horde. It seemed like the hackers were rambling through the servers looking for the things you mention. I didn't know whether they were snooping or trying to use mail servers.