[exim] restarting spamd makes spam slip through?

Hi all.

I run Exim 4.63 and SpamAssassin (from acl) on FreeBSD.
Sometimes when I need to restart spamd I find that a few spam mails slip
through, even though spamd is unavailable for less than a second. To
prevent this from happening I tried to stop exim first, wait a few
seconds, and then restart spamd, but the problem still occurs sometimes.

I get three of these in paniclog:
spam acl condition: warning - spamd connection to 127.0.0.1, port 783
failed: Connection refused
spam acl condition: all spamd servers failed

How can I make sure exim has nothing 'going on' while I restart spamd?


Regards,
Andreas