Revised inbound email protocol security at the CSSF

In order to increase email security at the CSSF, all inbound emails are now checked with an email authentication protocol using Domain-based Message Authentication, Reporting & Conformance policies (DMARC) at the Domain Name System level (DNS), verifying server origin and digital signature of the email using the Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) protocols.

Any failure during these verification steps will result in the email not being delivered to its intended recipient(s).

Please make sure your DNS records are complete and correctly configured according to SPF/DKIM/DMARC best practices to avoid any rejected mails towards the CSSF.