Hi, You will have to check the help pages for each of the mail services/systems in question and follow their procedures to reset your passwords and also double check their connection type and ports etc. to make sure you are using the correct settings.
no-one here will be able to help you with that
To check that it is not emClient that is causing the problem you would be well advised to go to each providers “webmail” page and try to login with your password. If you can’t remember it then the only option is to get it reset as described above sadly.
Hope that helps and… I don’t work for emClient and can help no further