SOA
Start of Authority
Primary NS
Mailbox
dnsmaster.ns12.nameserver.de
Serial
2025081800
Refresh
10000
Retry
1800
Expire
604800
Minimum TTL
3600
MX
Mail Exchangers
TXT
TXT Records
v=DMARC1; p=reject; adkim=s; aspf=s;
v=spf1 a mx include:spf.clustermail.de -all
A