You can protect your site from incoming spam by creating and advertising one or several "spam-trap" E-mail addresses. The CommuniGate Pro Router detects a special local address, spamtrap. If your server receives a message, and at least one of its recipients is spamtrap@yourhost or at least one of its recipients is routed to spamtrap, the Server rejects the entire message.
You may want to create one or several alias records for "nice-looking" fictitious E-mail addresses and route those addresses to spamtrap:
<misterX> = spamtrap <email@example.com> = spamtrap
Alternatively, you can create Forwarders pointing to the spamtrap address.
Then you should do your best to help these addresses (misterX@yoursite.com, firstname.lastname@example.org) to get to the bulk mailing lists used by spammers. Since most of those lists are composed by robots scanning Web pages and Usenet newsgroups, place these fictitious addresses on Web pages and include them into the signatures used when you and your users post Usenet messages. To avoid confusion, make the fictitious E-mail addresses invisible for a human browsing your Web pages and/or attach a comment explaining the purpose of these addresses.
Many bulk mailing lists are sorted by the domain name, and as a result many spam messages come to your site addressed to several recipients. These recipients are the E-mail addresses in your domain(s) that became known to spammers. When the fictitious, "spam-trap" addresses make it to those databases, most of spam messages will have these addresses among the message recipients. This will allow the Server to reject the entire messages, and they will not be delivered to any real recipient on your site.
When at least one of the incoming message recipient addresses is routed to the spamtrap address, the entire message is rejected, and the IP Address of the sending server is placed into the Temporarily Blocked Addresses list, unless this IP Address is included into the Client IP Addresses or White Hole Addresses lists.