We recieve fax spam from a certain number, so when I enable fax filtering like this:
(number censored for privacy)
All incomming faxes from any number are blocked with the following error in the logs:
Is this a bug or is there a specific format the numbers have to be entered in there ?
What Xerox model of MFP are you faxing from?
I think you are doing everything correctly. I found nothing about this in my research. This is very possibly a glitch of some kind. I see no entries in recent software updates that address this issue.
What software version is currently on the device?
Based on your model of B7035 and controller sw of 1.70.3, your firmware version is actually 58.64.1 general release from July of 2020.
You can try to upgrade the firmware to 58.66.1 to see if this may resolve the issue you are seeing. Although there is no mention of this issue in the release notes (or past versions). However, it is worth a shot.
Yes, same issue still, as soon as one number is in the filter list, all numbers are blocked with error.
What is the best conect option to create a ticket.