How to Scrape Emails From Facebook
why might a company want/need the email addresses from Facebook? The most prevalent reason may be to obtain the contact information for your clients so you can notify them of any deals or news about your company.
ProxyCrawl’s Leads API is by far the best and easiest way to new leads. The best part about it is it won’t repeat any leads that you have already done. This ensures that any email you get will be new and applicable for your use.
I have tried and tested. Hope this will help you in your business.