diff --git a/src/yunohost/domain.py b/src/yunohost/domain.py
index 6c094e80b..a9df20026 100644
--- a/src/yunohost/domain.py
+++ b/src/yunohost/domain.py
@@ -342,6 +342,9 @@ def _build_dns_conf(domain, ttl=3600):
             {"type": "TXT", "name": "mail._domainkey", "value": "\"v=DKIM1; k=rsa; p=some-super-long-key\"", "ttl": 3600},
             {"type": "TXT", "name": "_dmarc", "value": "\"v=DMARC1; p=none\"", "ttl": 3600}
         ],
+        "example_of_a_custom_rule": [
+            {"type": "SRV", "name": "_matrix", "value": "domain.tld.", "ttl": 3600}
+        ],
     }
     """