LinuxQuestions.org - sendmail Authentication-Warning and spam

Hi all,
I am running sendmail on RH 8 and in /var/log/maillog I get this warning.

Authentication-Warning: nobody set sender to user<me@my.com> using -f

I figured that Its got to do with trusted user and hence I added nobody to trusted user by adding define(`confTRUSTED_USERS', nobody)dnl on sendmail.mc and generating new sendmail.cf and restarted sendmail.

But this still generates the same warning. Anyone had simillar problems?

Does this kind of warning make the mail a likely spam? How would I go about eleminating such warnings. Banging my head on this since two days.... :mad:

Any lead is appreciated.

Thanks in advance,
Chaitrahb