Version: 1.12.2 (using 4.3.2 (KDE 4.3.2), Mandriva Linux release 2010.0 (Official) for i586) Compiler: gcc OS: Linux (i686) release 2.6.31.6-desktop-1mnb Since the last 2 Mandriva system updates - which included kmail - e-mail retrival has slowed down seriously and this has impacted the rest of the system. Thats all.
This is probably nothing we can fix here. I suspect that you are running a heavy spamfilter.
Closing. There is really nothing we can do here with so few information.