sendmail masquerading

[Aaron Konstam]

We have 40 clients served by ab NIS server. We could like mail sent
from the clients to show the return address of the server. That has
always been done with the DM macro of the sendmail.cf file.
I changed an uncommented the masquerade line in the sendmail.mc file:
MASQUERADE_AS(`cs.trinity.edu')dnl

What seemed to be the correct DM macro line was inserted in the
sendmail.cf file by the make. But it does not work. The return address
still includes the name of the machine.

What have I done wrong and what can I do about it?
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Aaron Konstam
Computer Science
Trinity University
715 Stadium Dr.
San Antonio, TX 78212-7200

telephone: (210)-999-7484
email:akonstam at trinity.edu