[Mimedefang] find word in mail address

[CONTRERAS, Pablo]

Hi list! , I'm try to make a rule, It allow me find a word in the address (user at domain, user and domain).
I need to redirect all mail sent from addresses(in user name or domain) 
which contain some of this words for i.e. "word".

*1
sub filter_end {
if ($Sender =  =~ /^<?word\>?$/i ) { 
	# Is posible redirect the message?
}
this is correct?
Could you help me again?

Best Regards
Pablo