Use socket.getfqdn instead of hostname -f in test_email | refs #33810

tests/scripts/test_email.py

@@ -19,7 +19,6 @@ sys.path.append(str(Path(__file__).parents[1].resolve()))
 
 # pylint: disable=wrong-import-position
 from utilities import logging as lg  # noqa: E402
-from utilities.commands import exec_cmd  # noqa: E402
 from utilities.config import load_conf  # noqa: E402
 from utilities.network import get_ip  # noqa: E402
 
@@ -81,12 +80,10 @@ def check_relay(relay_host: str, relay_port: str, domain: str) -> tuple:
             out = subprocess.getoutput("grep -E '^myorigin' /etc/postfix/main.cf")
             myorigin = out.replace("myorigin", "").strip()
         # possible origin names
-        origins = set(
-            (
-                domain or None,
-                exec_cmd("hostname", log_output=False)[1] or None,
-                exec_cmd("hostname -f", log_output=False)[1] or None,
-            )
+        origins = (
+            domain or None,
+            socket.gethostname(),
+            socket.getfqdn(),
         )
         if myorigin not in origins:
             lg.warning('"myorigin" setting does not contain a valid domain')