Auto-replies to my mail/posting missing .cl. in address!

[Joe P. DeCello]

When I send mail using e-mail or when I post news using Pnews,
on a SS2 running 4.1.1  , people who respond sometimes "let me know"
that the .cl. is missing in my address.  Like right now in the From
line above it says> From: jpd at tardis.msu.edu  when it should be
From: jpd at tardis.cl.msu.edu   I have had this problem when e-mail
to others with an account on tardis.  Something is configuered wrong,
of course,  but where do I look?  How do I check what is in the 
NIS maps?

Any help would be appreciated.  Remember that address in the from
line is incorrect.  Add .cl. or send to address noted below.

Thanx,
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Joseph P. DeCello III                e-mail:  jpd at cad.msu.edu
Michigan State University             phone:  (517) 353-3027
Specialized Computing Support Services