where does kmail store emails?

Hi all! I kmail, when typing an email address, kmail gives a dropdown list of previously entered mail adresses. Now I trying to get rid of some badly formed email adressess from that list, but I cannot figure out where kmail stores this list. So, does anybody know where this list lives? I also try to give konqueror a list of adresses that it should present the user when he/she types something in the URL field. Where do I find this list? Nik -- Please do not email me anything that you are not comfortable also sharing with the NSA.