Relay Configuration The Relay service for inbound/outbound spam and antivirus scanning for N3/HCSN hosted *.nhs.uk email domains.
SPF, DKIM, DMARC Configuration Domain-based Messages Authentication Reporting and Conformance (DMARC) builds upon SPF and DKIM, and adds a reporting functionality.
Non Delivery Reports (NDRs) If you are receiving errors through the relay service then visit this page