''<p>Harald Wünsch [[#question-1523704|said]]</p>'' <blockquote>I have had an email address for 25 years (I don't want to lose it – my children, grandchildren and friends know the address). Every time I generate a new password, I get the response "The incoming mail server is already in use". No other provider has this kind of rubbish. How can I solve this problem? </blockquote> Is the account you're trying to add already present in Account Settings? When you generate a new account password, are you also generating an app password to use in TB in place of the account password? https://www.telekom.de/hilfe/apps-dienste/e-mail/posteingang-postausgang-server?samChecked=true If the account is already in TB, remove entries for the account from Settings/Privacy & Security, Saved Passwords, restart TB, enter the app password when asked for a password.