Two Factor Authentication - fit-project/fit GitHub Wiki
In case you have enabled two-factor authentication (2FA) for your e-mail account, you will need to create an app password and use it instead of your regular password in order to use the Mail Acquisition Tool and to send certified e-mails (PEC) after the acquisition.
This procedure may vary depending on the provider. Please check your provider's support page if you don't see it listed below.