policy daemon failure

[steve]

Hi
We use sqlgrey as a policy daemon for greylisting. It runs on
both our mail servers with a shared database on one of them. If the
database is unavailable for some reason on the main server the backup
rejects mail with "451 4.3.5 Server configuration problem" Is it
possible to change the default to accept the mail if the policy daemon
fails. Most of our users would prefer a bit of extra spam to losing
genuine mail.
Thanks
steve