A blocked number error will occur when a number you are trying to send to is manually blocked in our system. This is generally due to the number being disconnected at some point, rings constantly without reaching a fax tone, is picked up as a voice line, or due to a request from the recipient that we no longer allow traffic to this number.
If you received a blocked number error on one of your faxes, please dial the number from a phone line and wait to hear if you encounter a fax tone. If you encounter a fax tone then please provide us with the number that you are attempting to send to so that we can remove the number from the blocked list. You can send the number in question to firstname.lastname@example.org and we will get this updated for you.