Help with .procmailrc 2

thanks for the fast help
things worked quite well i guess, just that i
discovered that what i really need is a little different:

all incomming mails should be forwarded to the username in  X-Envelope-To.
only the username, for example: forward to "someone" if x-env is 
<someone(_at_)somewhere(_dot_)com>

if this is not possible with a mail it must be forwarded to x(_at_)y(_dot_)z

thank you
marcus