Name for that IP address (if the IP address is aa. When a client connects from an IP address not listed in the Client IP Addresses list,Īnd the Detect Clients by DNS Name option is enabled, the server tries to get the domain Note: each Domain can have its own Client IP Addresses list,Įxtending the Server-wide and Cluster-wide lists. You can specify your Client IP Addresses using the reverse lookup domain names. If you provide dial-up services, enter the IP address ranges you have allocated to your dial-up users. See the Network section for more details. The IP addresses are specified in a multi-line format. Process LAN IP Addresses as Clients Select this option to include all LAN IP Addresses into the Client IP Addresses list. That should be allowed to use your server as a mail relay: Client IP Addresses Section (realm), and click the Client IP Addresses link.Įnter the IP addresses on your client connect from, as well as the IP addresses of other systems Use the WebAdmin Interface to open the Network pages inside the Settings Networks as "messages from Clients", and your Server will relay them to the Internet. If all your usersĬonnect from one or several LAN(s), you can treat all messages coming from those Own user is to look at the network (IP) address it is coming from. The simplest way to decide if an incoming SMTP message or a SIP request is coming from your To your own Accounts, and should be relayed to other Internet sites only when you haveĮxplicitly allowed that type of relaying. Messages and Signal requests coming from other sources should go only To protect your site from spammers, you should restrict the Server relaying functionality.īasically, only your own users should be able to use your Server to relay E-mail messages and Signal requests Messages all over the world using your Server as an open relay.Īlso, if your SIP module can accept incoming SIP requests, your ServerĬan be used by "voip" spammers as a SIP relay engine: they can distribute theirĬalls and/or instant messages all over the world using your Server as an open relay. If your SMTP module can accept incoming TCP connections, your ServerĬan be used by spammers as a mail relay engine: they can distribute their The CommuniGate Pro Server has Protection Options that can help you to deal with "spam". Only overloads your Server resources, but it places you at risk of being recognizedĪs a spammer (since "spam" messages come from your Server). That server to route the message to several hundred addresses. In order to distribute their messages to millions ofĮ-mail addresses, spammers try to use any SMTP mail server on the InternetĪs a relay: they deliver one copy of the message to each mail server, requesting Mail retrieval very slow and difficult for your users.īesides the methods described in this section, additional methods are described in the Not only overloading your network and Server resources, but making Spammers fill your user Mailboxes with a huge amount of unwanted messages, The Internet is flooded with soliciting E-mail messages distributed to Processing Messages from Blacklisted Addresses.Un-listing Addresses (White Hole Addresses).
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