Update docs/configuring-dns.md: use the same string for IP address placeholder

Also: adjust the table's layout

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

docs/configuring-dns.md

@@ -42,26 +42,26 @@ If you are using Cloudflare DNS, make sure to disable the proxy and set all reco
 
 For other services which may need subdomain settings, see the table below and configure the DNS (`CNAME`) records accordingly.
 
-| Used by component                                                                                                          | Type  | Host                           | Priority | Weight | Port | Target                      |
-| -------------------------------------------------------------------------------------------------------------------------- | ----- | ------------------------------ | -------- | ------ | ---- | ----------------------------|
-| [Dimension](configuring-playbook-dimension.md) integration server                                                          | CNAME | `dimension`                    | -        | -      | -    | `matrix.example.com`        |
-| [Jitsi](configuring-playbook-jitsi.md) video-conferencing platform                                                         | CNAME | `jitsi`                        | -        | -      | -    | `matrix.example.com`        |
-| [Prometheus/Grafana](configuring-playbook-prometheus-grafana.md) monitoring system                                         | CNAME | `stats`                        | -        | -      | -    | `matrix.example.com`        |
-| [Go-NEB](configuring-playbook-bot-go-neb.md) bot                                                                           | CNAME | `goneb`                        | -        | -      | -    | `matrix.example.com`        |
-| [Sygnal](configuring-playbook-sygnal.md) push notification gateway                                                         | CNAME | `sygnal`                       | -        | -      | -    | `matrix.example.com`        |
-| [ntfy](configuring-playbook-ntfy.md) push notifications server                                                             | CNAME | `ntfy`                         | -        | -      | -    | `matrix.example.com`        |
-| [Etherpad](configuring-playbook-etherpad.md) collaborative text editor                                                     | CNAME | `etherpad`                     | -        | -      | -    | `matrix.example.com`        |
-| [Hydrogen](configuring-playbook-client-hydrogen.md) web client                                                             | CNAME | `hydrogen`                     | -        | -      | -    | `matrix.example.com`        |
-| [Cinny](configuring-playbook-client-cinny.md) web client                                                                   | CNAME | `cinny`                        | -        | -      | -    | `matrix.example.com`        |
-| [SchildiChat Web](configuring-playbook-client-schildichat-web.md) client                                                   | CNAME | `schildichat`                  | -        | -      | -    | `matrix.example.com`        |
-| [wsproxy](configuring-playbook-bridge-mautrix-wsproxy.md) sms bridge                                                       | CNAME | `wsproxy`                      | -        | -      | -    | `matrix.example.com`        |
-| [Buscarron](configuring-playbook-bot-buscarron.md) helpdesk bot                                                            | CNAME | `buscarron`                    | -        | -      | -    | `matrix.example.com`        |
-| [rageshake](docs/configuring-playbook-rageshake.md) bug report server                                                      | CNAME | `rageshake`                    | -        | -      | -    | `matrix.example.com`        |
-| [ma1sd](configuring-playbook-ma1sd.md) identity server                                                                     | SRV   | `_matrix-identity._tcp`        | 10       | 0      | 443  | `matrix.example.com`        |
-| [Postmoogle](configuring-playbook-bridge-postmoogle.md)/[Email2Matrix](configuring-playbook-email2matrix.md) email bridges | MX    | `matrix`                       | 10       | 0      | -    | `matrix.example.com`        |
-| [Postmoogle](configuring-playbook-bridge-postmoogle.md) email bridge                                                       | TXT   | `matrix`                       | -        | -      | -    | `v=spf1 ip4:<your-ip> -all` |
-| [Postmoogle](configuring-playbook-bridge-postmoogle.md) email bridge                                                       | TXT   | `_dmarc.matrix`                | -        | -      | -    | `v=DMARC1; p=quarantine;`   |
-| [Postmoogle](configuring-playbook-bridge-postmoogle.md) email bridge                                                       | TXT   | `postmoogle._domainkey.matrix` | -        | -      | -    | get it from `!pm dkim`      |
+| Used by component                                                                                                          | Type  | Host                           | Priority | Weight | Port | Target                             |
+| -------------------------------------------------------------------------------------------------------------------------- | ----- | ------------------------------ | -------- | ------ | ---- | -----------------------------------|
+| [Dimension](configuring-playbook-dimension.md) integration server                                                          | CNAME | `dimension`                    | -        | -      | -    | `matrix.example.com`               |
+| [Jitsi](configuring-playbook-jitsi.md) video-conferencing platform                                                         | CNAME | `jitsi`                        | -        | -      | -    | `matrix.example.com`               |
+| [Prometheus/Grafana](configuring-playbook-prometheus-grafana.md) monitoring system                                         | CNAME | `stats`                        | -        | -      | -    | `matrix.example.com`               |
+| [Go-NEB](configuring-playbook-bot-go-neb.md) bot                                                                           | CNAME | `goneb`                        | -        | -      | -    | `matrix.example.com`               |
+| [Sygnal](configuring-playbook-sygnal.md) push notification gateway                                                         | CNAME | `sygnal`                       | -        | -      | -    | `matrix.example.com`               |
+| [ntfy](configuring-playbook-ntfy.md) push notifications server                                                             | CNAME | `ntfy`                         | -        | -      | -    | `matrix.example.com`               |
+| [Etherpad](configuring-playbook-etherpad.md) collaborative text editor                                                     | CNAME | `etherpad`                     | -        | -      | -    | `matrix.example.com`               |
+| [Hydrogen](configuring-playbook-client-hydrogen.md) web client                                                             | CNAME | `hydrogen`                     | -        | -      | -    | `matrix.example.com`               |
+| [Cinny](configuring-playbook-client-cinny.md) web client                                                                   | CNAME | `cinny`                        | -        | -      | -    | `matrix.example.com`               |
+| [SchildiChat Web](configuring-playbook-client-schildichat-web.md) client                                                   | CNAME | `schildichat`                  | -        | -      | -    | `matrix.example.com`               |
+| [wsproxy](configuring-playbook-bridge-mautrix-wsproxy.md) sms bridge                                                       | CNAME | `wsproxy`                      | -        | -      | -    | `matrix.example.com`               |
+| [Buscarron](configuring-playbook-bot-buscarron.md) helpdesk bot                                                            | CNAME | `buscarron`                    | -        | -      | -    | `matrix.example.com`               |
+| [rageshake](docs/configuring-playbook-rageshake.md) bug report server                                                      | CNAME | `rageshake`                    | -        | -      | -    | `matrix.example.com`               |
+| [ma1sd](configuring-playbook-ma1sd.md) identity server                                                                     | SRV   | `_matrix-identity._tcp`        | 10       | 0      | 443  | `matrix.example.com`               |
+| [Postmoogle](configuring-playbook-bridge-postmoogle.md)/[Email2Matrix](configuring-playbook-email2matrix.md) email bridges | MX    | `matrix`                       | 10       | 0      | -    | `matrix.example.com`               |
+| [Postmoogle](configuring-playbook-bridge-postmoogle.md) email bridge                                                       | TXT   | `matrix`                       | -        | -      | -    | `v=spf1 ip4:matrix-server-IP -all` |
+| [Postmoogle](configuring-playbook-bridge-postmoogle.md) email bridge                                                       | TXT   | `_dmarc.matrix`                | -        | -      | -    | `v=DMARC1; p=quarantine;`          |
+| [Postmoogle](configuring-playbook-bridge-postmoogle.md) email bridge                                                       | TXT   | `postmoogle._domainkey.matrix` | -        | -      | -    | get it from `!pm dkim`             |
 
 ### SRV record for ma1sd