Why are there mail appeal ranks for donors that don’t have a mail address?

In a mail appeal, to filter out donors that don’t have a mailing address and therefore can’t be contacted by mail, simply use the ‘Address available’ filter. 

Dataro doesn’t impose exclusions by default in our modeling. This is because every nonprofit has a different approach to exclusions on a campaign by campaign basis. By providing predictions for every record, we provide the broadest possible range of potential selections, which can then be refined to land on the best possible list for a specific activity.