Update docs/configuring-dns.md: simplify instructions for ma1sd and Postmoogle

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

docs/configuring-dns.md

@@ -65,13 +65,13 @@ For other services which may need subdomain settings, see the table below and co
 
 ### SRV record for ma1sd
 
-To make the ma1sd Identity Server (which this playbook may optionally install for you) enable its federation features, you need to set up a `_matrix-identity._tcp` SRV record. Don't confuse this with the `_matrix._tcp` SRV record for server delegation, described above.
+To make ma1sd enable its federation features, you need to set up a `_matrix-identity._tcp` SRV record. Don't confuse this with the `_matrix._tcp` SRV record for server delegation. See the table above and [this section](configuring-playbook-ma1sd.md#adjusting-dns-records) for values which need to be specified.
 
 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`.
 
 ### MX and TXT records for Postmoogle
 
-To make the [postmoogle](configuring-playbook-bridge-postmoogle.md) email bridge enable its email sending features, you need to configure MX, SPF (TXT), DMARC (TXT) and DKIM (TXT) records. See the table above for values which need to be specified.
+To make Postmoogle enable its email sending features, you need to configure MX and TXT (SPF, DMARC, and DKIM) records. See the table above for values which need to be specified.
 
 ---------------------------------------------