[cobalt-users] Can't receive e-mail on some domains - RaQ4

["First Star Hosting" <1ststar@xxxxxxxxxxx>]

When sending an e-mail to a domain on my RaQ4, my client gets this error
message:

The original message was received at Wed, 17 Jan 2001 04:57:49 -0800 (PST)
from dialup-209.244.103.5.NewYork1.Level3.net [209.244.103.5]

   ----- The following addresses had permanent fatal errors -----
<bmillett@xxxxxxxxxxxxxxxxxx>

  ----- Transcript of session follows -----
... while talking to davincinetwork.org.:
>>> MAIL From:<millbarr@xxxxxxxxxxxxx> SIZE=123
<<< 501 5.1.8 <millbarr@xxxxxxxxxxxxx>... Domain of sender address
millbarr@xxxxxxxxxxxxx does not exist
501 <bmillett@xxxxxxxxxxxxxxxxxx>... Data format error

Reporting-MTA: dns; swan.prod.itd.earthlink.net
Received-From-MTA: DNS; dialup-209.244.103.5.NewYork1.Level3.net
Arrival-Date: Wed, 17 Jan 2001 04:57:49 -0800 (PST)

Final-Recipient: RFC822; bmillett@xxxxxxxxxxxxxxxxxx
Action: failed
Status: 5.5.2
Remote-MTA: DNS; davincinetwork.org
Diagnostic-Code: SMTP; 501 5.1.8 <millbarr@xxxxxxxxxxxxx>... Domain of
sender address millbarr@xxxxxxxxxxxxx does not exist
Last-Attempt-Date: Wed, 17 Jan 2001 04:58:39 -0800 (PST)


I tried searching on the cobalt site but couldn't find anything!  Any help
would be much appreciated.

Thanks,
Kevin