Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dkrz.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-31 14:06:16 UTC · ↺ Refresh
MX Hostnames
- mailin3.dkrz.de
- mailin4.dkrz.de
MX Priorities
- mailin3.dkrz.de: 10
- mailin4.dkrz.de: 10
A / AAAA Records
- 136.172.12.20 ↩ dkrzweb9.dkrz.de
- 2001:638:70e:10c::14 ↩ dkrzweb9.dkrz.de
Mail Server IPs
- 136.172.12.18 ↩ mailin3.dkrz.de
- 2001:638:70e:10c::12 ↩ mailin3.dkrz.de
- 136.172.12.19 ↩ mailin4.dkrz.de
- 2001:638:70e:10c::13 ↩ mailin4.dkrz.de
SOA Record
Raw SOA
ns1.dkrz.de hostmaster.dkrz.de 2026033147 172800 7200 1209600 7200
Primary NS (mname)
ns1.dkrz.de
Admin Email (rname)
hostmaster@dkrz.de
Serial
2026033147
Refresh
172800s
Retry
7200s
Expire
1209600s
Minimum TTL
7200s
Nameservers (NS)
dns-2.dfn.de
ns1.dkrz.de
ns2.dkrz.de
SPF Record
✓ Strict (-all)
v=spf1 +a:mailhost.dkrz.de +a:mailext-ha.dkrz.de -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- SPFv=spf1 +a:mailhost.dkrz.de +a:mailext-ha.dkrz.de -all
- google-site-verification=jhhv8KwxuYH97tJUAzbUyoOGe6F7wJO3UpZ07gwkpdI
- MS=D2B141813E6964B6E56B6DA955395FAB30A90E0F
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