Added the wiki to setup keycloak and shared mailbox in mailcow

Author: Aman Shah

docs/images/add_alias.png

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+# Setup Mailserver using Mailcow
+
+## Setup Keycloak in Mailcow
+
+1. To add or edit your Identity Provider configuration, log in to your mailcow UI as administrator, go to System > Configuration > Access > Identity Provider and select Keycloak from the Identity Provider dropdown.
+2. Create a `mailcow` client in keycloak
+3. Update the fields based on your configurations.
+4. An important thing to take care of is in the `Server Url` field, your url must be the keycloak URL followed by /auth like `https://keycloack.test.com/auth`
+5. You can enable `Auto-create users on login` which will autocreate your mailbox in the mailcow when you login to your mailserver using keycloak, provided the user is already present and enabled in keycloak.
+
+![](images/keycloak.png)
+
+Notes - 
+
+1. If we disable user in keycloak then user won't be able to login to mailcow but will continue getting mails
+2. Make mailbox as inactive - if we don't want a user to get mails
+3. Once mailbox is deactivated in mailcow - user can't even login to mailcow
+
+## Setup a Shared mailbox in Mailcow
+
+1. Create a shared mailbox in mailcow and login to that.
+2. Add delegation for a user - then only you can share the folder and update perms
+
+![](images/shared_folders.png)
+
+3. Once the delegation is added you can start to share it that users.
+
+![](images/sharing.png)
+
+### Shared mailbox with multiple folders
+
+1. You can create multile folders like `info`, `ops`, `jobs` etc in your shared mailbox and then share them across your team.
+
+![](images/multiple_folders.png)
+
+2. You can then write a filter rule so that if mail sent to your `jobs@test.com` it lands to your `jobs` folder.
+Click on `Preferences ->Mail -> Filter`
+
+![](images/filters.png)
+
+![](images/jobs_filter.png)
+
+3. You need to create a alias in mailcow so that any mails that gets sent to `jobs@test.com` goes to your shared mailbox like `shared@test.com`.
+This you can do by logging as admin in mailcow and then `Email -> Configuration -> Aliases -> Add Alias`
+
+![](images/add_alias.png)