Version: 1.13.1 (using 4.4.1 (KDE 4.4.1), Kubuntu packages)
OS: Linux (i686) release 2.6.31-20-generic
According to my tests here kmail is broken and complete not usable.
This scenario is critical here.
$HOME resides on NFS Server.
if kmail was used on an user jojo i.e. on "pc2" at 8:30h and is closed at 8:45 on "pc2", it is not possible to start kmail on any other clients in the local network for that user within the next hours.
Also kmail refuses to starts for that user again, if moved back to that pc2 and closed the senseless attemts to use kmail on pc11 i.e.
(except pc2 is shut down all kde services, kdm etc and all *akonadi* processes are killed, also the sockets etc. are delete manually).
it seems to me, using akonadi makes it impossible to use kmail/kontact/kdepim in such professional environments.
used system: kubuntu 9.10 + ppa resources as mentioned on www.kde.org for ubuntu.
Meta Bug 332624 - NFS support
Thank you for taking the time to file a bug report.
KMail2 was released in 2011, and the entire code base went through significant changes. We are currently in the process of porting to Qt5 and KF5. It is unlikely that these bugs are still valid in KMail2.
We welcome you to try out KMail 2 with the KDE 4.14 release and give your feedback.