detect if relayless situation will have emails sent to spam, refs #20849

tests/test_email.py

@@ -53,8 +53,15 @@ def check_relay():
     if status == 0:
         configured_relay = out[len('relayhost'):].strip(' \t=')
     else:
-        print_red('Configured relay not found.')
-        return False
+        configured_relay = None
+    if not configured_relay:
+        # no relay configured, check relayless situations
+        domain = conf.get('MS_SERVER_NAME').split('.')[-2:]
+        with open('/etc/mailname', 'r') as f:
+            d = f.read()
+            if domain != 'ubicast.tv' and domain not in d:
+                print_red('/etc/mailname does not contain the server domain, emails will probably be treated as spam')
+                return False
     conf_relay = conf.get('EMAIL_SMTP_SERVER')
     if conf_relay != configured_relay:
         print_red('Configured STMP relay (%s) does not match the expected value (%s).' % (configured_relay, conf_relay))