Chichegraup60 Which password do you want to change and how did you try it?
The MySwisscom password can be changed here, and it works properly
https://www.swisscom.ch/en/residential/help/data-and-bills/the-swisscom-login.html
the same password page you find also in MySwisscom under "profile" and then under "Swisscom Login & password"
(password for MySwisscom, Bluewin webmail, TV related topic, this community, it all the same).
For an external e-mail client you need another one, this can be changed here:
https://www.swisscom.ch/internet/online/app/Password?mode=mail_change&backlink=%2Finternet%2Fonline%...