--- a/sat/plugins/plugin_xep_0077.py	Fri Nov 27 16:26:36 2020 +0100
+++ b/sat/plugins/plugin_xep_0077.py	Fri Nov 27 16:29:06 2020 +0100
@@ -250,16 +250,18 @@
         return self.registerNewAccount(jid.JID(jid_), password, **kwargs)
 
     def registerNewAccount(
-        self, jid_, password, email=None, host="127.0.0.1", port=C.XMPP_C2S_PORT
+        self, jid_, password, email=None, host=None, port=C.XMPP_C2S_PORT
     ):
         """register a new account on a XMPP server
 
         @param jid_(jid.JID): request jid to register
         @param password(unicode): password of the account
         @param email(unicode): email of the account
-        @param host(unicode): host of the server to register to
+        @param host(None, unicode): host of the server to register to
         @param port(int): port of the server to register to
         """
+        if host is None:
+           host = self.host.memory.getConfig("", "xmpp_domain", "127.0.0.1")
         check_certificate = host != "127.0.0.1"
         authenticator = RegisteringAuthenticator(
             jid_, password, email, check_certificate=check_certificate)