diff --git a/docs/configuring-playbook-bot-postmoogle.md b/docs/configuring-playbook-bot-postmoogle.md
index 0fa366935..b66285a51 100644
--- a/docs/configuring-playbook-bot-postmoogle.md
+++ b/docs/configuring-playbook-bot-postmoogle.md
@@ -4,12 +4,26 @@
 
 The playbook can install and configure [Postmoogle](https://gitlab.com/etke.cc/postmoogle) for you.
 
-It's a bot/bridge you can use to forward emails to Matrix rooms
+It's a bot/bridge you can use to forward emails to Matrix rooms. 
+Postmoogle runs an SMTP email server and allows you to assign mailbox addresses to Matrix rooms.
 
 See the project's [documentation](https://gitlab.com/etke.cc/postmoogle) to learn what it does and why it might be useful to you.
 
+## Prerequisites
 
-## Adjusting the playbook configuration
+### Networking
+
+Open the following ports on your server to be able to receive incoming emails:
+
+  - `25/tcp`: SMTP
+  - `587/tcp`: Submission (TLS-encrypted SMTP)
+
+If you don't open these ports, you will still be able to send emails, but not receive any.
+
+These port numbers are configurable via the `matrix_bot_postmoogle_smtp_host_bind_port` and `matrix_bot_postmoogle_submission_host_bind_port` variables, but other email servers will try to deliver on these default (standard) ports, so changing them is of little use.
+
+
+### Adjusting the playbook configuration
 
 Add the following configuration to your `inventory/host_vars/matrix.DOMAIN/vars.yml` file:
 
@@ -21,9 +35,20 @@ matrix_bot_postmoogle_enabled: true
 
 # Generate a strong password here. Consider generating it with `pwgen -s 64 1`
 matrix_bot_postmoogle_password: PASSWORD_FOR_THE_BOT
+
+# Uncomment to add one or more admins to this bridge:
+#
+# matrix_bot_postmoogle_admins:
+#  - '@yourAdminAccount:domain.com'
+#
+# .. unless you've made yourself an admin of all bridges like this:
+#
+# matrix_admin: '@yourAdminAccount:domain.com'
 ```
 
-You will also need to add several DNS records so that postmoogle can send emails.
+### DNS
+
+You will also need to add several DNS records so that Postmoogle can send emails.
 See [Configuring DNS](configuring-dns.md).
 
 
@@ -51,3 +76,13 @@ Then send `!pm mailbox NAME` to expose this Matrix room as an inbox with the ema
 Send `!pm help` to the room to see the bot's help menu for additional commands.
 
 You can also refer to the upstream [documentation](https://gitlab.com/etke.cc/postmoogle).
+
+### Debug/Logs
+
+As with all other services, you can find their logs in [systemd-journald](https://www.freedesktop.org/software/systemd/man/systemd-journald.service.html) by running something like `journalctl -fu matrix-bot-postmoogle`
+
+The default logging level for this bridge is `INFO`, but you can increase it to `DEBUG` with the following additional configuration: 
+
+```yaml
+matrix_bot_postmoogle_loglevel: 'DEBUG'
+```
diff --git a/roles/custom/matrix-bot-postmoogle/defaults/main.yml b/roles/custom/matrix-bot-postmoogle/defaults/main.yml
index 4eeb835be..0c9db2d70 100644
--- a/roles/custom/matrix-bot-postmoogle/defaults/main.yml
+++ b/roles/custom/matrix-bot-postmoogle/defaults/main.yml
@@ -81,10 +81,10 @@ matrix_bot_postmoogle_maxsize: '1024'
 # A list of admins
 # Example set of rules:
 # matrix_bot_postmoogle_admins:
-# - @someone:example.com
-# - @another:example.com
-# - @bot.*:example.com
-# - @*:another.com
+# - '@someone:example.com'
+# - '@another:example.com'
+# - '@bot.*:example.com'
+# - '@*:another.com'
 matrix_bot_postmoogle_admins: "{{ [matrix_admin] if matrix_admin else [] }}"
 
 # Sentry DSN. Deprecated, use matrix_bot_postmoogle_monitoring_sentry_dsn