To remedy this, it might help to abort the current action and re-start it. First, quit KMail by using KRunner (Alt + F2) or Konsole and typing: kquitapp kmail. Note that a normal Alt + F4 or File -> Quit does not do the trick! Wait a minute, then start KMail again. Now start akonadiconsole using KRunner (Alt + F2) or Konsole. Go to the Mail Dispatcher Agent, do a right-click and abort the current action. You will most likely get some error messages popping up. Go back to KMail and choose File -> Send Queued Messages. Now it might work. If not, instead of aborting the current action, try toggling the offline/offline status of the Mail Dispatcher Agent or restarting things like mentioned in the workaround 2 of the problem above this one.
