IP Restrictions and You

Odds are the folks looking at this probably don’t do the bulk of the deployments for their companies. But in the odd chance that they are or have direct access to them, I’m going to touch on a very important aspect of ExchangeDefender deployment: IP restrictions. First we’ll start with a nice bright list of what the ranges are:

· 65.99.255.0/24

· 206.125.40.0/24

Now here’s why you need to first off add them for your client’s mail flow. Remember that in order for us to deliver mail on behalf of the original sender you have accept mail anonymously. This is very easy to do (it’s just the next tab on the receive connector GUI. The downside to allowing anonymous delivery WITHOUT the restrictions is that you’re one step away from being an “Open Relay”. If you’re an open relay, that will surely get your connection blacklisted on RBLs, it may get your access to our network revoked for a period of time based on the severity of the outbreak. So the cons of not setting these correctly are pretty huge:

· Interrupted/Inconsistent inbound mail flow

· Outbound mail flow restrictions

Carlos Lascano
VP Support Services, ExchangeDefender
carlos@ownwebnow.com
(877) 546-0316 x737