Hello, I'm a Certified Security Expert, and have experience defending against all types of threats. I can guarantee the security of your server, and I will try to remove your SMTP IP's from any blacklists that I can. Please note, removal of an IP address from a blacklist is only able to be done at the sole digression of the blacklist provider. I have no control over their decision, I will only be able to contact them and comply with their request(s) and/or requirement(s) for removal if they provide any.