[Exim] Spamassassin and exiscan

Whishlist...

hi guys,

i use exiscan with SpamAssassin and i see that if spamd crash
exiscan/exim wouldn't accept any message at all... can i set two spamd
servers? can exim/exiscan doesn't reject message but forward without
check if spamd is down?

Thanks

Riccardo