Hexiosec ASM User Guides
Managing Risks
SPF Hard Fail risks
0 min
risk spf is set to hard fail all other sources ( all) whilst this is the strictest choice, it can lead to email deliverability issues soft fail ( all) provides a better compromise between security and reliability for most organisations for more information, see section 5 of https //www m3aawg org/sites/default/files/m3aawg email authentication recommended best practices 09 2020 pdf from the messaging, malware and mobile anti abuse working group remediation update the spf record for the domain to soft fail mail that doesn't pass an spf check, i e update to all