People change their provider and get a new e-mail address. From some people I have 3 addresses but 2 are obsolete. I can't remember which ones. So I want to remove the old addresses, not a whole e-mail account. If I send a new e-mail to a friend and I have typed part of my friends name, I don't want to see obsolete addresses as options. I only want to see 1 correct address. If your answer is something like "Go to the Adress Book", please do tell me - exactly - where this Address Book is and how I will be able to edit and save it. I have Thunderbird 31.5.0. Thank you. Frans1.