use_envelope_from / envelope_from_address

[spekul]

hello list,

after having read through http://wiki.mutt.org/?MuttGuide/Send, i  
tried setting use_envelope_from and envelope_from_address accordingly  
to different sender profiles. i am using mutt 1.4.2.3i, built from  
freebsd ports.

are these variables that only work in mutt development sources aka  
1.5? with those variables set, on startup i get:

Error in /home/spekul/.mutt/profiles/[EMAIL PROTECTED], line 3:  
use_envelope_from: unknown variable
Error in /home/spekul/.mutt/profiles/[EMAIL PROTECTED], line 4:  
envelope_from_address: unknown variable

any ideas?

thanks,

frank