[8|]This would most likely be better answered by sending a ticket to Icewarp using http://esupport.icewarp.com. Please post any answer you get here though for reference [8|]
No, it is 32 bit software at the moment. But IceWarp is multi-threaded and can therefore use all of your cpu cores. And I hope it never requires more than a few MB of memory!
But certainly you can install 64 bit database software (that you use in conjunction with IceWarp) or other useful services which really need more than 2 GB of RAM.