Update docs/configuring-dns.md: edit the section for TXT and MX records

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

docs/configuring-dns.md

@@ -67,9 +67,9 @@ For other services which may need subdomain settings, see the table below and co
 
 To make the ma1sd Identity Server (which this playbook may optionally install for you) enable its federation features, you need to set up a SRV record. When setting up a SRV record, if you are asked for a service and protocol instead of a hostname split the host value from the table where the period is. For example use service as `_matrix-identity` and protocol as `_tcp`.
 
-## `_dmarc`, `postmoogle._domainkey` TXT and `matrix` MX records setup
+### `_dmarc`, `postmoogle._domainkey` TXT and `matrix` MX records setup
 
-To make the [postmoogle](configuring-playbook-bridge-postmoogle.md) email bridge enable its email sending features, you need to configure SPF (TXT), DMARC (TXT), DKIM (TXT) and MX records
+To make the [postmoogle](configuring-playbook-bridge-postmoogle.md) email bridge enable its email sending features, you need to configure SPF (TXT), DMARC (TXT), DKIM (TXT) and MX records. See the table above for values which need to be specified.
 
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