Sender domain not found (sendmail)

Chris Joyce (chris@hislora.com.au)
Wed, 23 Dec 1998 00:04:38 +1100 (EST)

hi,
from time to time I get the following type of message

Nov 30 18:58:12 joy sendmail[13901]: JAA11875:
to=<Wismark@aol.com>,<Gmarksusa@aol.com>, delay=09:25:29, xdelay=00:13:50,
mailer=esmtp, relay=zb.mx.aol.com. [198.81.16.33], stat=Deferred: 450
<john@bilock.net>... Sender domain not found in DNS (see RFC 1123,
sections 5.2.2 and 5.2.18).

how do I stop it this form going on ?

chris

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