6. If a retrieved policy record does not contain a valid "p" tag, or
contains an "sp" tag that is not valid, then:
1. if a "rua" tag is present and contains at least one
syntactically valid reporting URI, the Mail Receiver SHOULD
act as if a record containing a valid "v" tag and "p=none"
was retrieved, and continue processing;
2. otherwise, the Mail Receiver applies no DMARC processing to
this message.
In case of 6.2 "no DMARC processing", the currently returned fail is a confusing piece of information.
RFC7489 states:
In case of 6.2 "no DMARC processing", the currently returned
fail
is a confusing piece of information.