Thanks for the bug report,
Could you please try to reproduce it and provide us with a backtrace as described in http://wiki.ubuntu.com/Backtrace ?
** Changed in: kdepim (Ubuntu)
Assignee: (unassigned) => Ryan Kavanagh
Status: Unconfirmed => Needs Info
--
kmail crashes on disk full
https://launchpad.net/bugs/89039