Things that can go wrong

From Computer Tyme Support Wiki

Things that can go wrong during Spam Filter Activation

The spam filtering system is pretty simple in design. Normally email goes directly to your email server. To use our filters what you do is tell the world that our servers are the servers that receive email for your domain. This is done through DNS (Domain Name Services). DNS has a record called the MX (Mail eXchange) records to tell the world where the email goes.

When email arrives at our servers we process it and send it on to your server. We have a routing table that we set up when we create your account. We read your current MX record and stor it in our table, something like this.

domain.com: mail.domain.com