Problem with moving email servers to new IP

We have discovered a rather annoying email problem this week. Because of a closure of a data centre we have used for over 10 years, we have been forced to pickup our servers and move them over to a new data centre. As annoying and as much work as this is, we have found one particular issue with the change of our primary email servers over to a new IP. In recent years, there has been a new emergence of spam email fighting systems. Cisco is using it’s power of basically routing almost every bit of data on the internet to directly monitor IP addresses real time. They call this and is part of their IronPort spam scanning service. We have had our email servers running for years with a “Good” reputation on this service. However when we move the IP to a new block, we have found that… Read More »Problem with moving email servers to new IP