Indeed, so many of AWS’s IP ranges are used for DDoS and malicious behaviour they end up getting blacklisted due to their poor reputation. It’s a bit like using

Indeed, so many of AWS’s IP ranges are used for DDoS and malicious behaviour they end up getting blacklisted due to their poor reputation. It’s a bit like using one third party resellers shared IP ranges in your mail relay - you’re asking to end up on reputation based lists. There’s a lot to be said for your IP reputation on the internet and when you outsource that - you outsource your freedom to maintain your reputation risk.