Guide Dépannage Informatique

je recois chaque fois que j'essais d'envoyer 1 msg le message suivant :Hi. This is the qmail-send program at yahoo.com.I'm afraid I wasn't able to deliver your message to the following addresses.This is a permanent error; I've given up. Sorry it didn't work out.<65.54.245.72 does not like recipient.Remote host said: 550 Requested action not taken: mailbox unavailableGiving up on 65.54.245.72.--- Below this line is a copy of the message.et comme je ne suis pas assez fort en anglais j'ai rien compris . merci de me dechifrer ce message