Are you still pursuing leads that typically don’t work with external recruiters or agencies?

About a month ago, my company closed, prompting me to take a more independent path in recruitment. As I reach out to new prospects, I’m finding myself in uncharted territory with sales. I’m curious about how to handle a common situation: when a company states they have a policy against working with external recruiters. Should I continue to follow up, or is it best to move on? What strategies do others use in these cases?