diff --git a/DnsServerCore/Dns/ZoneManagers/AllowedZoneManager.cs b/DnsServerCore/Dns/ZoneManagers/AllowedZoneManager.cs
index 22633a94..03672e05 100644
--- a/DnsServerCore/Dns/ZoneManagers/AllowedZoneManager.cs
+++ b/DnsServerCore/Dns/ZoneManagers/AllowedZoneManager.cs
@@ -58,7 +58,7 @@ namespace DnsServerCore.Dns.ZoneManagers
 
         private void UpdateServerDomain(string serverDomain)
         {
-            _soaRecord = new DnsSOARecordData(serverDomain, "hostadmin." + serverDomain, 1, 900, 300, 604800, 60);
+            _soaRecord = new DnsSOARecordData(serverDomain, "hostadmin@" + serverDomain, 1, 900, 300, 604800, 60);
             _nsRecord = new DnsNSRecordData(serverDomain);
 
             _zoneManager.ServerDomain = serverDomain;