After 6 years of absence, I participated again in a KDEPIM meeting, to fix some issues in Akonadi in order to improve my daily life :-)
Here's a report of what I did:
Fixed: "incomplete collection" error in mixedmailresource (bug 285973)
Fixed: mixedmaildir resource can lose email when changing message flags (bug 289428)
Fixed: Assert in imap resource when resuming work after going offline (bug 291810)
Fixed: cancelling mail check doesn't really work (two different bugs)
KMail is one of the most important applications inside KDE, I think hardly can argue anybody about it. Everybody is using email, and even if some think that a webmail solution can be just as good, most of us still do what we did 10-15 years ago: download mail to our computer/phone/tablet and carry that around.
And for that we need a mail application.
I'm experimenting with providing a CI (continuous integration) server for KDEPIM.
For a while I've been running a cronjob that triggers a cmake script. This script then polls the repositories for 24 hours and every time a change was detected a build was performed. The results from this was feed to http://my.cdash.org (kdepim, kdepimlibs and kdepim-runtime).