E-mail: message d'erreur, 550: "No such recipient" (in reply to RCPT TO command)

[proulout]

Bonjour,

Je reçois un message d'erreur de ce genre lorsque j'envoie à une personne en particulier:

CODE

Objet : Undelivered Mail Returned to Sender

This is the SMTP Server program at host blabalbla

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

          The SMTP Server program

<[email protected]>: host 100.100.100.100
[100.100.100.100] said: 550
  No such recipient (in reply to RCPT TO command)
Reporting-MTA: dns; relayawl-blabla
X-SMTP-Server-Queue-ID: 44AD6282D39
X-SMTP-Server-Sender: rfc822; expé[email protected]
Arrival-Date: Fri, 11 Apr 2008 18:52:32 +0200 (CEST)

Final-Recipient: rfc822; blabala
Action: failed
Status: 5.0.0
Diagnostic-Code: X-SMTP-Server; host 100.100.100.100[100.100.100.100]  
said: 550 No
  such recipient (in reply to RCPT TO command)

Cela dit quelquechose à quelqu'un?

[proulout]

Ok après recherches, ce message d'erreur intervient lorsque l'adresse du destinataire n'est pas active, ou n'existe pas...