Qui peut me dire pourquoi certains de mes messages expédiés dans une liste de diffusion me reviennent avec cette explication (ou me dire ou je peux la trouver) un grand merci

This is the Postfix program at host smtp5-g19.free.fr.

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 Postfix program

<H.Becquemin@wanadoo.fr>: host smtp.wanadoo.fr[193.252.22.92] said:
550
<H.Becquemin@wanadoo.fr>: Recipient address rejected: User unknown (in

reply to RCPT TO command)





merci de votre réponse. dodomi@free.fr

This is the Postfix program at host smtp5-g19.free.fr.

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 Postfix program

<H.Becquemin@wanadoo.fr>: host smtp.wanadoo.fr[193.252.22.92] said:
550
<H.Becquemin@wanadoo.fr>: Recipient address rejected: User unknown (in

reply to RCPT TO command)





merci de votre réponse. dodomi@free.fr

This is the Postfix program at host smtp5-g19.free.fr.

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 Postfix program

<H.Becquemin@wanadoo.fr>: host smtp.wanadoo.fr[193.252.22.92] said: 550

<H.Becquemin@wanadoo.fr>: Recipient address rejected: User unknown (in

reply to RCPT TO command)





merci de votre réponse. dodomi@free.fr

"utilisateur inconnu"

L'adresse est erronée (quoique correcte dans sa syntaxe)