diff --git a/dyndomain b/dyndomain
index 7c9f189..24318e4 100755
--- a/dyndomain
+++ b/dyndomain
@@ -201,9 +201,13 @@ def write_zone_list(zone_filename, zone, update):
 
 def log(msg):
     stamp = time.strftime("%Y-%m-%d %H:%M:%S")
-    with open(log_filename, 'a') as logfile:
+    if sys.stdout.isatty():
         for line in msg.split('\n'):
-            logfile.write("%s - %s\n" % (stamp, msg))
+            print("%s - %s" % (stamp, msg))
+    else:
+        with open(log_filename, 'a') as logfile:
+            for line in msg.split('\n'):
+                logfile.write("%s - %s\n" % (stamp, msg))
 
 
 def log_update_zone(update):
@@ -226,7 +230,7 @@ def ovh_update_zone(domain, zone, update, sync_zone):
                     result = client.get('/domain/zone/{}/record'.format(domain),
                                         fieldType=prot, subDomain=name)
                     for id in result:
-                        print('OVH: delete entry #{} {} {}'.format(id, name, prot))
+                        log('OVH: delete entry #{} {} {}'.format(id, name, prot))
                         client.delete('/domain/zone/{}/record/{}'.format(domain, id))
 
         for prot, name, addr in update['delete']:
@@ -238,43 +242,45 @@ def ovh_update_zone(domain, zone, update, sync_zone):
             for id in result:
                 r = client.get('/domain/zone/%s/record/%d' % (domain, id))
                 if r['fieldType'] == prot and r['target'] == addr:
-                    print("OVH: delete entry for %s %s %s (#%s)" % (name, prot, addr, id))
+                    log("OVH: delete entry for %s %s %s (#%s)" % (name, prot, addr, id))
                     client.delete('/domain/zone/%s/record/%d' % (domain, id))
 
         for prot, name, addr in update['add']:
             if not prot in ['A', 'AAAA']:
                 continue
-            print("OVH: create entry for %s %s %s" % (name, prot, addr))
+            log("OVH: create entry for %s %s %s" % (name, prot, addr))
             client.post('/domain/zone/%s/record' % domain,
                     fieldType=prot,
                     subDomain=name,
                     target=addr,
                     ttl=60)
 
-        print("OVH: Refresh zone %s" % domain)
+        log("OVH: Refresh zone %s" % domain)
         client.post('/domain/zone/%s/refresh' % domain)
         return True
     except:
-        print('OVH update error\n')
+        log('OVH update error\n')
         return False
 
+
 def livebox_rule_id(words):
     id='dyndomain_{}'.format('_'.join(words))
     id = id.replace('.', '_')
     return id
- 
+
+
 def livebox_delete_port_nat(port, addr):
-    print('livebox: delete PortNat {} to {}'.format(port, addr))
+    log('livebox: delete PortNat {} to {}'.format(port, addr))
     id = livebox_rule_id([port])
     r = sysbus.requete('Firewall:deletePortForwarding', { 'id': id, 'origin': 'webui' })
 
 def livebox_delete_pinhole(port, addr):
-    print('livebox: delete pinhole {} to {}'.format(port, addr))
+    log('livebox: delete pinhole {} to {}'.format(port, addr))
     id = livebox_rule_id([port, addr])
     r = sysbus.requete('Firewall:deletePinhole', { 'id': id, 'origin': 'webui' })
 
 def livebox_add_port_nat(port, addr):
-    print('livebox: add PortNat {} to {}'.format(port, addr))
+    log('livebox: add PortNat {} to {}'.format(port, addr))
     id = livebox_rule_id([port])
     a = {
         'id': id,
@@ -288,7 +294,7 @@ def livebox_add_port_nat(port, addr):
     r = sysbus.requete('Firewall:setPortForwarding', a)
 
 def livebox_add_pinhole(port, addr):
-    print('livebox: add pinhole {} to {}'.format(port, addr))
+    log('livebox: add pinhole {} to {}'.format(port, addr))
     id = livebox_rule_id([port, addr])
     a = {
         'id': id,
@@ -326,7 +332,7 @@ def send_update_mail(mail_to, mail_from, zone_domain, update, mail_ignore_list,
     if not okmail:
         return
 
-    print('Send email to %s' % mail_to)
+    log('Send email to %s' % mail_to)
     msg = EmailMessage()
 
     msg['Subject'] = "Livebox update in %s" % zone_domain
@@ -354,7 +360,6 @@ def send_update_mail(mail_to, mail_from, zone_domain, update, mail_ignore_list,
     s = smtplib.SMTP('localhost')
     s.send_message(msg)
     s.quit()
-    #print(txt)
 
 
 load_conf()
@@ -366,7 +371,7 @@ if not ping(wan_hostname):
 sysbus.load_conf()
 r = sysbus.auth(False)
 if not r:
-    print('Error: cannot authenticate on livebox')
+    log('Error: cannot authenticate on livebox')
     sys.exit(1)
 
 hosts = get_hosts()