Re: [bitfolk] Whitelist mail by domain

I've just had a brief interchange with a small charity that uses DigitalOcean for some of their systems. A password-change mail from their website was binned by my exim instance, for a score of 8.8 given to it by the Bitfolk SpamAssassin (5.0 of that for coming from Digital Ocean). Can anyone suggest how, if at all, I can whitelist mail from that particular domain in my (Debian) exim4 config, given that I'm using the Bitfolk SpamAssassin and therefore have no control over it?