I have configured it to happen on my email accounts and it does not work. It does work when using accounts that i have been using for a long time. This has started to happen on a new user with a blank database to which i added an account i use for mailing lists only. The database populated with some of the latest emails in the mailing lists. I had to create a new user with a empty email database because i could no longer use kmail without getting "Retrieving folders.." hang on a current user.