NDR user unknown

John Potter jpotter at falcon.lhup.edu
Mon Jan 10 00:27:15 UTC 2000


My problem: Some mail addressed to jpotter at falcon.lhup.edu is NDR
by cardinal.lhup.edu.

The desire: (I think) Mail to user at falcon.lhup.edu should be delivered
to falcon.  Also any other machine.  Mail to user at lhup.edu should be
delivered to cardinal.  If user has no box on cardinal, it will bounce,
but that is ok.

The DNS:

lhup.edu	3600 IN	NS	starling.lhup.edu
lhup.edu	3600 IN	SOA	starling.lhup.edu administrator.lhup.edu(
			110	;serial (version)
			3600	;refresh period
			600	;retry refresh this often
			86400	;expiration period
			3600	;minimum TTL
			)
lhup.edu	3600 IN	MX	10 cardinal.lhup.edu
lhup.edu	0 IN	65281	???
Additional information:
starling.lhup.edu	3600 IN	A	151.161.44.11
cardinal.lhup.edu	241 IN	A	151.161.11.3

falcon.lhup.edu	3600 IN	A	151.161.11.6

Other info:
falcon aix/sendmail
cardinal nt/exchange
One outside mailer outlook express for mac

Questions:
1.  Sould the DNS work for all external mailers?
    If so, the senders have a problem.

2.  If not, what entries would allow the desire?

3.  If the above is valid, could cardinal exchange settings cause
    the problem anyway?

John



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