Email Authentication

duo.nl

SPF

pass
Declares which servers may send mail for this domain.
v=spf1 mx a ip4:62.112.225.180 ip4:89.221.178.154 ip4:212.159.201.77 ip4:212.159.201.78 include:spf.protection.outlook.com ~all

DKIM

pass
Cryptographic signature on outbound mail (selector: selector1).
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQD4Jx7mfrBXvD2aixqYdpkrcwI+YklRCRXpU5KZOq2UXEgW1uW1+o4n8vS3j5H15r8/6u64LAL5CTKo49jRslh8lweyPsnhedrz3AdWIbQ/9dXIxRGUt1T8aMYLJCbcXkSK/KrE8fMCBTPsyvuan86z9xgjIKR0oN9TNftiyT+u9QIDAQAB;

DMARC

pass
Tells receivers what to do with mail that fails SPF/DKIM. Policy: quarantine.
v=DMARC1;p=quarantine;rua=mailto:rua@duo.nl;adkim=r;aspf=r;pct=100;sp=reject

Mail Servers (MX)

10 grnms102.duo.nl
10 grnms101.duo.nl