Email Archiver 3, works like a read only email client. It downloads emails from your IMAP server (it will not any mail mark read or change its state in anyway).
If you are using an email provider with two factor authentication enabled, you must use an “Application Specific Password”. Otherwise, your regular email password will work as expected.
We have recently added oAuth support, please add your gmail account (or google apps business email) using the ‘Add Account’ button and selecting ‘Google or Gmail Account’ when prompted.