GatewayDefender is a managed service designed to protect your clients from email-based threats, such as viruses and worms, spam, adult content, dangerous attachments, phishing (fraud), and Denial of Service (DoS) attacks. These Electronic Message Threats (EMT) can slow down servers, shut down email boxes, and cost your clients money. Gateway Defender protects against these attacks using EMT Interdiction (EMTi) to stop dangerous emails before they reach an inbox.
Once ordered, the service protects all mailboxes on your domain; you can not select which email addresses to protect and which not to protect. If you add a mailbox after the GatewayDefender service is enabled for your domain, or while a remove request is still pending, GatewayDefender will be notified of the change and you will not be billed for the deleted mailbox on the next month's invoice.
Note: After you have added the GatewayDefender package and purchased the service, it takes one full business day to set up mail protection on your domain. Depending upon the day of the week on which you placed the order (e.g. Friday, weekend day, holiday, etc.), it can take up to five days for your account to be set up.