Dmarc March 21, 2024 by public documentation _dmarc subdomain, TXT reject all, lose policy reject all, strict spf and DKIM policy
SPF July 16, 2024November 14, 2023 by public documentation Cluster 1 (the Netherlands – Brabant) Cluster 2 (the Netherlands – Rotterdam) Cluster 3 (the Netherlands – Brabant) Location 4 (Germany)