[exim] Auto-whitelist

Hi,

We use exim 4.62 with mysql. I'd like to set up whitelist that is
automatically updated with $recipients value when a user in our domain
sends out an email. The $recipients is a comma delimited list of the
recipients available during data acl. I see that it can be done using
the Perl but I was hoping not to have to use Perl for performance
reasons. Has anyone done this without using Perl?

Thanks.
Craig