I keep getting "authentication error" when adding a new email account

Hi lee_ev_2002, Since you're using an Infomaniak account and an Infomaniak-generated device password, the Account Hub may be the part causing the problem rather than the password itself. Infomaniak's current Thunderbird settings are: Incoming: mail.infomaniak.com, port 993, SSL/TLS Outgoing: mail.infomaniak.com, port 587, STARTTLS Username: your complete email address Password: the device password generated by Infomaniak. There have been previous Thunderbird authentication problems involving the Account Hub, although the option to disable it has changed in newer Thunderbird versions. If Thunderbird 157 is not giving you a way to bypass Account Hub, could you tell us exactly what happens after you enter the Infomaniak address and device password? A screenshot of the authentication error would also be helpful. That should tell us whether Thunderbird is rejecting the password or whether Account Hub is failing before it gets that far.