only root can send mail, normal user's can't

[Tamas MEZEI <tamas_(_at_)_bazmag_(_dot_)_hu>]

Hi,

I'm using a 2-days old snapshot and having a quite annoying
feature/bug/whatever in the default sendmail config: user's cannot send
mail to external addresses, sendmail says "error in
/etc/mail/sendmail.cf line 0". Root can send mail anywhere.

This box must not relay mail to anywhere just send logs for users.

I'm no sendmail wizard, could anyone help me to change/fix this? 
Thank you.

Tamas