In the world of faxing, there is no real spam filter. Fax technology is old….it doesn’t have the same capabilities as modern e-mail. Once your number is on a fax spam list it can be sold over and over again on the dark web to new spammers.
Our fax servers block many countries including Russia, most of eastern Europe, Iran, N Korea and other known spammers, but that is not a full solution. The professional spammers use proxy servers that mask their real origin. A fax can be sent from Moscow and appear that it’s coming from your own area code.
If the fax spam has a contact phone number, you can call and ask that they remove you from their list. You can threaten to report them to the FCC. (see below) If your fax spam is random, then there is not much you can do about those.
So, if your existing fax number is all spammed up the best solution might be to get a new fax number. Of course, your number is probably published in several places, and your customers have been using it for years. So ‘changing’ your number would be a big project. The better way to resolve this is to keep the old fax # and then also get a new number. Over time, as your website and marketing materials are updated with the new number, you can eventually delete the old number. The spam will end.
This is not a perfect answer, but that’s really the best way to resolve a fully spammed fax number.
Here's the laws and regulations from the FCC:
Click here to sign up for a new e-mail fax number