qmail badmailto / badmailfom... any qmail expert around?

Anyone any idea on a way to to setup a sort of badmailto rules that affect only a specific domain, or specific from (like a merge of badmailfom and badmailto, that would allow to setup rules that would match both only if both from and to matches) or any other way that would allow to achieve same purpose?

The issue is I do have a specific client that persists on mailling to old mail list hitting some old hotmail accounts that apparently got disabled and turned into spamtraps, I would like to backlist all out mails from only that client accounts to @hotmail addresses to avoid hotmail blocking server’s ip.

Unfortunately, qmail doesn’t support doing anything like this. I’ve looked and asked around and can find no way to do this.

Thank you for looking anyway.