Sendmail Return Receipt

[Dale Morris]

Hi,
I want to configure mutt to give me a dsn notification if the message
is delayed or can't be delivered and also to send me a return receipt
when the message is received. I'm using debian 'woody' version of
sendmail. I've tried the manual and I believe the proper flag is "R
hdrs" but when I use  set sendmail="R hdrs" I get an error.

thanks