It is ForwardMX. I only forward emails and dont allow sending over my service. I can not avoid getting blacklisted at some point but i have a system that checks

It is ForwardMX. I only forward emails and dont allow sending over my service. I can not avoid getting blacklisted at some point but i have a system that checks for this and a hoster that gives me new ips within minutes :) Also i am building in more and more things to make aure that does not happen ao fast like next is SRS