Whether or not DMARC approves a message is based on both/either DKIM and SPF also approving. That string says that both SPF and DKIM must align and to Reject an

Whether or not DMARC approves a message is based on both/either DKIM and SPF also approving. That string says that both SPF and DKIM must align and to Reject any message that fails either. The SPF record has "-all" which means to fail any message that is not from the designated approved mailserver. Since there isn't one defined, all messages will be failed. Having these will not impact your domain's reputation, but not having them can if you become party to spoofing. The only catch is that it will take as long as your record's TTL to make the domain sendable again, and even longer for some webmail providers who like to hang on to cached records past their expiry. If you are at a larger company you will want to look up the rua/ruf tags and set up an aggregator because one of your other business units will totally try to send a newsletter from the domain and instruct their business partners to manually whitelist it >_>