I am all of the sudden getting this error from BackupExec 9.0.4202 for Netware.

Netware Conslole Screen:
BESRVR.nlm : Unable to send e-mail. An error response was received from the
server (8201 : 554)
BESRVR.nlm : Transaction failed.

SMTP Server Log:
Session 7261; child 1; thread 108068
Accepting SMTP connection from [192.168.x.x : 17565]
--> 220-xxx.com ESMTP MDaemon 9.0.7; Tue, 13 Mar 2007 07:27:49 -0400
--> 220 Unauthorized relay are prohibited.
<-- HELO xxx
--> 250 xxx.com Hello xxx pleased to meet you
<-- MAIL FROM:
postmaster@xxx.com is an alias for mail@xxx.com
--> 250 , Sender ok
<-- RCPT TO:
--> 250 , Recipient ok
<-- DATA Creating temp file (SMTP):
--> 354 Enter mail, end with .
Message size: 316 bytes
--> 554 Message does not conform to standards
Connection closed
SMTP session terminated (Bytes in/out: 430/330)

Error 554 Message does not conform to standards.
I don't know what standard I need to meet or how to correct? All our other
email notifications work fine Netware, APC, Xerox, DiscZerver & SACE