AUTHed smtp USER+BADRCPTTO=DENY, why?

[Gennady G. Marchenko]

 Hello guys.

There is a problem with badrcptto file. If I put in it some address, 
then user who successfuly did smtp auth can't send mail to it. Why? As I 
know, after user authed over smtp - RELAYCLIENT env will set. Does it?

Best wishes,
Gennady.