As/400 send email problem

We can't send an email to anyone at this janelgroup.net from our AS/400.  I
can send email from other mail servers, and my customer has tested it using
AOL and it works.

Does this message indicate a problem with the DNS?

Thanks.


FROM:    QGATE@uncommoncarrier.com
TO:      <xxx@UNCOMMONCARRIER.COM>
DATE:    Fri, 19 Jan 2001 11:38:38 -0500

RE:      UNDELIVERABLE MAIL

NOT ABLE TO DELIVER MAIL TO SOME/ALL RECIPIENTS.
REPLY CODES WITH FIRST DIGIT = '4' OR '5' ARE ERROR REPLIES.
ERRORS THAT DO NOT HAVE ERROR REPLY CODES MAY EXIST.

HOST uncommoncarrier NOT ABLE TO DELIVER MAIL TO FOLLOWING RECIPIENT(S):
   <xxx@janelgroup.net>
NOT ABLE TO RESOLVE RECIPIENT'S ADDRESS.

Art Tostaine, Jr.
CCA, Inc.
Jackson, NJ 08527

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