Ok as Vin I decide to test this service but the post replied now was really not a good news.
Is there any service like this that seems to be acceptable ? It should exist in the world isn't it ? But on mian search on google more free service offer only limited time disposable adresses, or limited number. Spammotel is free, works well, with non limited adresses, replies are possible and hide, but sometime, it took 2 days to one month to send email