Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
spiekermann.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 08:16:07 UTC · ↺ Refresh
MX Hostnames
- spiekermann-de.mail.protection.outlook.com
MX Priorities
- spiekermann-de.mail.protection.outlook.com: 10
A / AAAA Records
- 85.13.134.41 ↩ dd11732.kasserver.com
Mail Server IPs
- 52.101.73.26 ↩ mail-as9pr05cu01302.inbound.protection.outlook.com
- 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 52.101.68.29 ↩ mail-dbapr03cu00105.inbound.protection.outlook.com
- 52.101.68.10 ↩ mail-dbbpr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca09::1 ↩ mail-as9pr07cu00301.inbound.protection.outlook.com
- 2a01:111:f403:ca04::f ↩ mail-db7pr03cu00507.inbound.protection.outlook.com
- 2a01:111:f403:ca04::8 ↩ mail-db5pr02cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1050.ui-dns.de hostmaster.1und1.com 2017060169 28800 7200 604800 600
Primary NS (mname)
ns1050.ui-dns.de
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060169
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns1050.ui-dns.de
ns1106.ui-dns.org
ns1104.ui-dns.com
ns1090.ui-dns.biz
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com mx:spiekermann.de -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject; pct=100; rua=mailto:[email protected];; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- knowbe4-site-verification=3c18fbd74590a2e3989546dd8c3aabb8
- SPFv=spf1 include:spf.protection.outlook.com mx:spiekermann.de -all
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