from & to fields

[Domas Lukoshius <asimov@xxxxxxxxxxxx>]

Hello,

Is it possible to make mutt change 'From:' field in header, when replying mail ?

For example, I've got mail to: oneofmybox@xxxxxxxxxx, and when I press 'r' to 
reply,
mutt changes my 'From:' field to 'oneofmybox@xxxxxxxxxx'.
Now it sets 'From:' to default email address, which is set in "my_hdr From:".

I think I can do it with 'set alternates' ?
But my mutt 1.5.6i does'nt recognize this function:

Error in /home/domas/.muttrc, line 11: alternates: unknown variable

Thanks for answers,
Domas.