Back to series

This video shows you a method of blocking faxes from being sent to recipients by the use of a registry entry on your RightFax DocTransport servers.

As we have seen with a prior RightFax University video, you can block outbound faxes via the Dialing Rules options on a RightFax DocTransport server. This video presents an alternate method that uses a built-in registry entry on the doctransport server. This is useful if you have a large amount of dialing rules or routing tables to manage and parse or if you are looking for a different way to manage Do Not Call listings.

The location of the entry is:


on a 32-bit system or for 64-bit:


By default, DocTransports blocks outgoing faxes to any number that
begins with 911 (the standard emergency number throughout the United States).

To block additional numbers, edit the BlockedNumbers value
to enter the prefix, full number, or partial number of each phone you want to block. Separate multiple entries with carriage returns.

The key is a Type: REG_MULTI_SZ
The default value is blank indicating that no numbers are blocked.

Let's try sending a fax to a number we have on the blocked list.

And there we see that the fax is not allowed to be sent.

That is all for blocking faxes using the BlockedNumbers registry key on the RightFax DocTransport server.

As always if you have any questions about this topic or any topic in the world of faxing let us know at The Fax Guys, we are always happy to help.

This is Jay with RightFax University saying thank you for watching and Please visit us again. The RightFax University is a work under continual progress and we update often.