diff --git a/dyndomain b/dyndomain
index 0b99060..b7d5bfd 100755
--- a/dyndomain
+++ b/dyndomain
@@ -124,7 +124,6 @@ def zone_add_entry(zone, prot, name, addr, stamp):
 
 
 def populate_zone(zone, wan_hostname, wan_addr, hosts, hosts_list, hosts_nat, domain, stamp):
-
     wan_hostname = full_name(wan_hostname, domain)
 
     if not zone.get('A'):
@@ -144,14 +143,15 @@ def populate_zone(zone, wan_hostname, wan_addr, hosts, hosts_list, hosts_nat, do
             for addr in hosts.get(host, []):
                 zone_add_entry(zone, 'AAAA', full_name(host, domain), addr, stamp)
 
-def process_zone(zone, stamp, grace_period):
+
+def process_zone(zone, stamp, grace_period, sync_zone):
     update = { 'add': [], 'delete': [] }
     for prot in zone:
         for name in zone[prot]:
             add = False
             for addr in zone[prot][name]:
                 e = zone[prot][name][addr]
-                if e['first'] == stamp:
+                if e['first'] == stamp and not sync_zone:
                     update['add'].append([prot, name, addr])
                     add = True
             for addr in zone[prot][name]:
@@ -160,6 +160,8 @@ def process_zone(zone, stamp, grace_period):
                     update['delete'].append([prot, name, addr])
                 elif not add and stamp - e['last'] > grace_period:
                     update['delete'].append([prot, name, addr])
+                elif sync_zone:
+                    update['add'].append([prot, name, addr])
 
     if not update['add'] and not update['delete']:
         update = None
@@ -202,10 +204,20 @@ def log_update_zone(update):
             log('%5s %-20s %-6s %s' % (op, name, prot, addr))
 
 
-def ovh_update_zone(domain, update):
+def ovh_update_zone(domain, zone, update, sync_zone):
     try:
         client = ovh.Client()
 
+        if sync_zone:
+            for prot in zone:
+                for name in zone[prot]:
+
+                    result = client.get('/domain/zone/{}/record'.format(domain),
+                                        fieldType=prot, subDomain=name)
+                    for id in result:
+                        print('OVH: delete entry #{} {} {}'.format(id, name, prot))
+                        client.delete('/domain/zone/{}/record/{}'.format(domain, id))
+
         for prot, name, addr in update['delete']:
             result = client.get('/domain/zone/%s/record' % domain,
                                 fieldType=prot,
@@ -290,13 +302,17 @@ hosts = get_ipv6_hosts()
 wan = get_wan_addr()
 
 zone = read_zone_list(zone_filename)
+sync_zone = False
+if not zone:
+    sync_zone = True
+
 stamp = int(time.time())
 populate_zone(zone, wan_hostname, wan, hosts, hosts_list, nat_list, zone_subdomain, stamp)
-update = process_zone(zone, stamp, zone_timeout)
+update = process_zone(zone, stamp, zone_timeout, sync_zone)
 if update:
     log_update_zone(update)
 
-    success = ovh_update_zone(zone_domain, update)
+    success = ovh_update_zone(zone_domain, zone, update, sync_zone)
     if success:
         send_update_mail(mail_to, mail_from, zone_domain, update, mail_ignore_list, wan)