Le Sat 26/06/2010, lee disait > On Sat, Jun 26, 2010 at 07:24:55PM +0200, Erwan David wrote: > > > > receiving directly needs a MX record, which needs a static IP because of DNS caches > > If you use dyndns, they set the ttl to one minute. Some resolvers have a minimum caching bigger than that. -- Erwan