Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sibo-beton.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 12:51:14 UTC · ↺ Refresh
MX Hostnames
- mx02.augustoppermann.de
- mx01.augustoppermann.de
MX Priorities
- mx01.augustoppermann.de: 10
- mx02.augustoppermann.de: 30
A / AAAA Records
- 212.63.145.94 ↩ linux04.rw.serviceprovider.de
Mail Server IPs
- 217.7.183.3 ↩ mx01.augustoppermann.de
- 80.147.230.129 ↩ mx02.augustoppermann.de
SOA Record
Raw SOA
ns12.nameserver.de dnsmaster.ns12.nameserver.de 2025061000 10000 1800 604800 3600
Primary NS (mname)
ns12.nameserver.de
Admin Email (rname)
dnsmaster@ns12.nameserver.de
Serial
2025061000
Refresh
10000s
Retry
1800s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns12.nameserver.de
ns11.nameserver.de
SPF Record
✓ Strict (-all)
v=spf1 mx a -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;sp=quarantine;pct=100;adkim=s;aspf=r;rua=mailto:[email protected];ruf=mailto:[email protected];ri=86400;fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 mx a -all
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