Added guide: manual configuration

tutorials/manual-config.md

@@ -1,2 +1,34 @@
-# TODO
+# Manual Configuration
-This manual does not exist yet. It is to be added at a later time.
+
+**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 email to [marcel@faircode.eu](mailto:marcel@faircode.eu). Bad reviews won't help you or the developer, so try asking in person first.
+
+**NOTE:** In most cases, an automatic configuration via the wizard described in the [first configuration guide](first-config.md) should work right away. If you are using a custom domain & server and the wizard doesn't work as expected, you can enable automatic configuration by implementing [RFC 6186](https://datatracker.ietf.org/doc/html/rfc6186) within the DNS and / or [Thunderbird:Autoconfiguration](https://wiki.mozilla.org/Thunderbird:Autoconfiguration). An independent guide for both methods can be found in [Auto Discover | LD Documentation](https://doc.ld-online.net/e-mail/auto-discover).
+
+## Accounts & Identities
+**Accounts** are basically your IMAP and POP3 accounts for reading mails. FairEmail uses your account to fetch _incoming_ mails.
+
+**Identities** are SMTP accounts for sending mails. FairEmail will use the identity to send _outgoing_ mails.
+
+## Adding a new E-Mail Account
+**NOTE:** This step requires working internet connection.
+
+Adding a new email account (account + identity) is pretty straightforward. Just follow these steps:
+
+1. Open the "Main" settings
+2. Click on "Manual setup and account options" below the wizard
+3. Press the "Accounts" button
+4. Click on the "+" icon to add a new account
+5. Select your provider or "custom"
+6. Enter your account credentials and modify the server name & port, if necessary
+7. Press the "Check" button
+8. Check the recognized default folders
+9. Save with "Add related identity" enabled
+10. Enter the Identity details (e.g. the FROM name and address)
+
+Here are some screenshots to help you visualize these steps:
+
+![Manual setup and account options](manualconf-01.png)
+![Adding new IMAP / POP3 account](manualconf-02.png)
+![Saving account](manualconf-03.png)