We are having a problem with symantec cloud (formerly messagelabs) and our email being blocked by the backscatterer blacklist. We have checked our mail servers and we are NOT sending backscatter.
This blacklist sees backscatter coming from the ip address that our mail is sent from. However we have no control over that ip address, it seems that symantec cloud sends on our email from a range of ip addresses, most of which are blacklisted. Being cloud based in this way is a problem as these ip addresses are used by other cloud customers so If one of them is producing backscatter everyone whose mail is sent via the same ip addresses will also be blacklisted. I assume that is what is happening in this case.
This is causing us a serious business issue as some of our customers use an ISP that uses the backsctterer black list and so they are not getting emails from us and demanding refunds for not getting the notifications they are paying for.
How do we stop this from happening other then to stop using this product?