Autosupport mail is rejected by "DMARC unauthenticated mail is prohibited" Last updated Save as PDF Share Share Tweet Share Views:147Visibility:PublicVotes:0Category:ontap-9Specialty:coreLast Updated: Applies to ONTAP9 Issue Failed to deliver Autosupport mail to autosupport@netapp.com. 550 #5.7.1 DMARC unauthenticated mail is prohibited.