Hi Sanford, Thanks for the insightful information! I was trying to look for a solution that solves for the concerns you shared. So, I've included this in a Marketo LP and ran a few tests. It's properly blocking out "gmail.com," "aol.com," etc in line 14. But, it's not blocking emails from that larger list you shared, from freemail/free.txt at master · willwhite/freemail · GitHub Can you advise on how we can block all emails seen in that list? Thank you!
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