remailer security, sendmail

I just read an interesting post on alt.hackers. Apparently you can figure out who's sending mail to who by repeatedly running the command /usr/lib/sendmail -bp. I just tested this out and it *seems* to work, as does running /usr/ucb/mailq repeatedly. How's that for an obscure feature? Does anyone run a remailer on a multi-user machine where sendmail is used? Is this sendmail feature a problem? If so, how would one fix it? (write a wrapper for sendmail? but that requires root access *sigh*) Am I missing something? ------------------------------------------------------------------------------- David Wagner dawagner@princeton.edu