IP Address Range Editor (advanced view)
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IP Address Range Editor (Advanced View)  
You can choose to block single IP addresses or IP address ranges to cover the complete set of mail servers owned by an entity from whom you don't wish to receive email.  
To manually add an IP address to the blocklist:  
1.Type the IP address in the Min boxes: xxx.xxx.xxx.xxx. Click the More hyperlink to access a webpage the provides the WhoIs application.  
Note: If you've set a configuration option to use a 3 rd party WhoIs application, ChoiceMail One launches this application when you click the More hyperlink.  
2.Click the finger button to copy the Min IP address as the Max IP address. You can then edit the Max IP address to specify a range of addresses. The green light indicates that the IP address or range you've entered is valid.  
3.In the Optional comment box, enter a description that identifies this IP range. The description displays next to the IP numbers in the IP Address Range Editor dialog.  
4.In the Max allowed DNS failures box, enter the maximum number of DNS failures you're willing to accept before refusing additional attempts from a server. This feature protects you from spammers who might try to break the system by generating large numbers of fake server addresses in an attempt to slow down your system.  
5.Click the Add range button to add this IP address or range to the list of blocked IP addresses.  
How does the Replace button work? It overwrites what's in the Min/Max boxes.  
Select an IP address and click the Delete button to remove it from the list of blocked IP addresses.  
What about host lookup? Where and what does it look it up?  
Note 1: When you add a new IP address range, the Address Range Editor tries to optimize the total number of ranges by merging the new range into the existing list of ranges. As a consequence the total number of ranges may not change or may even decrease. This is normal.  
Note 2: ChoiceMail One adds the IP addresses and ranges you've added to your blocklist to the Get IP Address transform rule, that is called by the Domain Address Check permission rule. Do not delete this permission rule (in the Permission management dialog) or you will delete your IP address blocklist.  
See also:  
IP Address Range Editor (simple view)