Simple bounce for a specific address

I want to bounce mail for one specific address, I have a lot of mail
which gets forwarded to my work E-Mail and one specific form of one
of the addresses I want to bounce.

Would a formula something like the following work? :-

    :0
    * ^TOxxxxx(_at_)aaa(_dot_)bbb(_dot_)ccc
    | $SENDMAIL -oi -t

or should I pipe it through formail first as well, e.g.:-

    :0
    * ^TOxxxxx(_at_)aaa(_dot_)bbb(_dot_)ccc
    | formail | $SENDMAIL -oi -t



-- 
Chris Green (chris(_at_)areti(_dot_)co(_dot_)uk)
  Home: chris(_at_)isbd(_dot_)demon(_dot_)co(_dot_)uk            Work: 
cgreen(_at_)bcs(_dot_)org(_dot_)uk
  WWW: http://www.isbd.co.uk/
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