Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
steinbeis-sibe.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 09:05:43 UTC · ↺ Refresh
MX Hostnames
- sophos01.steinbeis-sibe.de
- mail01.steinbeis-sibe.de
MX Priorities
- mail01.steinbeis-sibe.de: 20
- sophos01.steinbeis-sibe.de: 10
A / AAAA Records
- 88.99.131.245 ↩ static.245.131.99.88.clients.your-server.de
Mail Server IPs
- 178.15.197.2 ↩ mail01.steinbeis-sibe.de
- 176.94.157.219 ↩ sophos01.steinbeis-sibe.de
SOA Record
Raw SOA
ns1.first-ns.de dns.hetzner.com 2026031908 900 600 604800 900
Primary NS (mname)
ns1.first-ns.de
Admin Email (rname)
dns@hetzner.com
Serial
2026031908
Refresh
900s
Retry
600s
Expire
604800s
Minimum TTL
900s
Nameservers (NS)
robotns2.second-ns.de
robotns3.second-ns.com
ns1.first-ns.de
SPF Record
✓ Strict (-all)
v=spf1 a mx a:sophos01.steinbeis-sibe.de a:ec2-3-123-158-231.eu-central-1.compute.amazonaws.com ip4:88.99.131.245/20 ip4:88.99.71.126/20 ip4:178.15.197.0/29 include:servers.mcsv.net include:sibe.academyfive.net include:spf.cluster.4hr.de -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
k1._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: k1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
6 records- google-gws-recovery-domain-verification=57468113
- SPFv=spf1 a mx a:sophos01.steinbeis-sibe.de a:ec2-3-123-158-231.eu-central-1.compute.amazonaws.com ip4:88.99.131.245/20 ip4:88.99.71.126/20 ip4:178.15.197.0/29 include:servers.mcsv.net include:sibe.academyfive.net include:spf.cluster.4hr.de -all
- atlassian-sending-domain-verification=78fcfab8-a929-40b8-a8e2-3625b5f67a0e
- atlassian-domain-verification=3yakjiNLHGtk4aySkQK252l3aZID6etZ1JU/mdouzvZfMhqYaomHP673Tp2hZB0L
- 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
- seobility=baf892bf915f14d76cb734fbdffc496a
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