i tried with putty and can not connect to the IP, i have look by Orange forums. There block the port 25, can only be used with authentified SSL credentials.
I need to use a smart host with authification :
Oct 5 10:01:59 mail default/smtp[20335]: D7E368A066A: to=mmichel@xxxxx.com, relay=auth.smtp.1and1.fr[212.227.15.184]:587, delay=90367, delays=90366/0.08/0.5/0.22, dsn=2.0.0, status=sent (250 Requested mail action okay, completed: id=0MASzq-1blcKr2Wyo-00Bc4p)
Oct 5 10:04:35 mail default/smtp[20495]: 2813E8A066A: to=moise.michel@xxxxx.fr, relay=auth.smtp.1and1.fr[212.227.15.168]:587, delay=0.76, delays=0.08/0.03/0.46/0.18, dsn=2.0.0, status=sent (250 Requested mail action okay, completed: id=0LkkrY-1bHFyh38lQ-00aTKy)
thanks for your help