[exim] ignore spam scanning of outgoing mail

exim is running on my 3 mailhubs.
currently it scans all mail that passes through it for both virus and spam.
how do i disable the outgoing spam scanning?
we use spam assassin via the exiscan acl. we also use it to virus scan
so simply allowing all our hosts to be ignored from scanning would be
ummm not preferred...

thanks
ronan


--
Regards

Ronan McGlue
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Analyst/Programmer
Information Services
Queens University Belfast
BT7 1NN