**NOTE:** If you have any troubles, check [this extensive FAQ](https://github.com/M66B/FairEmail/blob/master/FAQ.md).
You may also ask in [this XDA Forum thread](https://forum.xda-developers.com/t/app-5-0-fairemail-fully-featured-open-source-privacy-oriented-email-app.3824168/)
or via [this contact form](https://contact.faircode.eu/?product=fairemailsupport). Bad reviews won't help you or the developer, so please try asking in person first.
If your email provider is not listed, or if you want to authenticate using a password, choose "Other provider".
**NOTE:** OAuth only works for the Play Store and GitHub version. Third party builds (e.g. on F-Droid) do not support OAuth.
**NOTE:** Google OAuth only works for Google accounts added on your Android device. Also see [FAQ #111 Is OAuth supported?](https://github.com/M66B/FairEmail/blob/master/FAQ.md#user-content-faq111)
**NOTE:** Even with battery optimization disabled, FairEmail won't drain your battery. The app usage will be high. But that does not mean high battery usage. See [FAQ #39 How can I reduce the battery usage of FairEmail?](https://github.com/M66B/FairEmail/blob/master/docs/FAQ-en-rGB.md#user-content-faq39) for more information.
Apart from that, there's also [this separate tutorial describing various settings / options](https://github.com/M66B/FairEmail/blob/master/tutorials/SETTINGS-OVERVIEW.md) in FairEmail.
The permanent notification is a necessary foreground service as many phones kill the app once there is nothing in the foreground anymore.
However, it is designed in a way that it has no toll on your battery. If the permanent notification banner annoys you, you can just turn the notification off.