I'm having an issue where a particular owner of a domain(IP 188.8.131.52) is getting a bad reputation from senderbase. The IP is not in any blacklists and the owner does use authentication for sending out mails.
Given that i implemented a few IronPorts at some clients, the guy contacted me to ask if there's a way to remove this bad reputation from Senderbase.
On Monday, they did disable a feature on their mail server where the server was sending out a reply to sender asking for authentication before the server accepts the mail. But they did disable that feature thinking that it might be the cause of the issue.
They have been using this IP and server since 4 years and why have this issue now?
Can someone pls help on how to contact Senderbase to get this IP reputation clearing?