John Keown wrote:
All mail servers have routers built into the mail server as an underlying
method to handle and route email in addition to dns. It is accomplished with
an or or an exclusive or operation which is a form of division. Therefore
the address space specified must be in this case by 256 which it is not.
But they don't route anything based on the information in the SPF TXT
record, so your claim is absurd.