we have an address email@example.com that receives mail all the time but yesterday this bounced from someone:
From: Mail Delivery System <Mailer-Daemon@elasmtp-banded.atl.sa.earthlink.net>
>Sent: Feb 14, 2011 2:40 PM
>Subject: Mail delivery failed: returning message to sender
>This message was created automatically by mail delivery software.
>A message that you sent could not be delivered to one or more of its
>recipients. This is a permanent error. The following address(es) failed:
> SMTP error from remote mail server after RCPT TO:<firstname.lastname@example.org>:
> host mail1.no-ip.com [188.8.131.52]: 550 5.1.1 <email@example.com>:
> Recipient address rejected: User unknown in relay recipient table
Can anyone tell why this bounced?