Most of us set up SPF, DKIM and DMARC once, watch the reports for a week or two, and then leave them alone. That's usually the right call. They aren't systems that need constant attention.
Source: [Dev.to](https://dev.to/steven_browning_70ac8fbfa/your-dmarc-record-might-contain-something-that-no-longer-exists-nii)