[Exim] rule to exclude some recepients

sirs, i have antispam router and would like exclude mail for some our users,
wich names i have in mysql db:
local_part_prefix = ! ${lookup mysql {MYSQL_Q_NOSPAMCHECK}{$value}}

as a result -- all mail bypass my spamcheck router :-(

may be, there is more correct variable for 'envelope to' param (like senders
for envelope from)?

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SA@Ecros, call: 6965