Advice Request, Need To Harvest Email Addresses From Craigslist Job Board.

Looking for a way to find automate finding craigslist email addresses from the jobs board section. I've only been doing ones where the poster opted out of using the Craigslist email relay. However, going through and finding these manually is very impractical and seemingly there's no way to tell if the user opted out without doing a captcha.

Anyone know of a good software or got tips on how to speed this up? If there's another decently active jobs board with more accessible addresses that would be helpful as well.

Sorry if this is the wrong forum, I am new to this site.