Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
zirbelstube.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 17:12:28 UTC · ↺ Refresh
MX Hostnames
- mx3.osn.de
- mx2.osn.de
- mx1.osn.de
MX Priorities
- mx1.osn.de: 10
- mx2.osn.de: 20
- mx3.osn.de: 30
A / AAAA Records
- 159.69.86.36 ↩ server11.ansichtssache.de
- 2a01:4f8:c2c:4620:: (no PTR)
Mail Server IPs
- 194.45.27.123 ↩ mx01.osn.de
- 194.45.27.124 ↩ mx02.osn.de
- 213.241.148.44 ↩ mx03.osn.de
SOA Record
Raw SOA
dns.osn.de root.osn.de 1723450506 14400 3600 1209600 86400
Primary NS (mname)
dns.osn.de
Admin Email (rname)
root@osn.de
Serial
1723450506
Refresh
14400s
Retry
3600s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
dns.osn.org
dns.osn.de
dns.osn.net
SPF Record
✓ Soft Fail (~all)
v=spf1 mx include:servers.mcsv.net include:osn.de ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ 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
1 record- SPFv=spf1 mx include:servers.mcsv.net include:osn.de ~all
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