Email Authentication
stadt-koeln.de
SPF
passDeclares which servers may send mail for this domain.
v=spf1 mx a:otc-de-spf.mms.t-systems-service.com ip4:91.151.20.22 include:ekom21.de include:successfactors.eu -all
DKIM
noneCryptographic signature on outbound mail (selector: none).
No record published.
DMARC
passTells receivers what to do with mail that fails SPF/DKIM. Policy: quarantine.
v=DMARC1;p=quarantine;sp=quarantine;pct=100;rua=mailto:dmarc@stadt-koeln.de
Mail Servers (MX)
10 mail1.stadt-koeln.de
10 mail2.stadt-koeln.de