Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
biesterfeld.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 07:22:08 UTC · ↺ Refresh
MX Hostnames
- biesterfeld-com.mail.protection.outlook.com
MX Priorities
- biesterfeld-com.mail.protection.outlook.com: 0
A / AAAA Records
- 91.227.98.76 ↩ rewrites.bit-serv.de
Mail Server IPs
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 52.101.68.3 ↩ mail-db7pr03cu00403.inbound.protection.outlook.com
- 52.101.73.12 ↩ mail-am4pr0401cu00104.inbound.protection.outlook.com
- 52.101.73.22 ↩ mail-am7pr05cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca09::b ↩ mail-am7pr05cu00103.inbound.protection.outlook.com
- 2a01:111:f403:ca04::8 ↩ mail-db5pr02cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca09::f ↩ mail-am7pr05cu00307.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.telekom-domains.de dns.telekom.de 2026020503 10800 3600 2419200 43200
Primary NS (mname)
ns1.telekom-domains.de
Admin Email (rname)
dns@telekom.de
Serial
2026020503
Refresh
10800s
Retry
3600s
Expire
2419200s
Minimum TTL
43200s
Nameservers (NS)
ns1.telekom-domains.de
ns2.telekom-domains.de
SPF Record
✓ Strict (-all)
v=spf1 exists:%{i}.spf.hc318-95.eu.iphmx.com include:spf.nl2go.com ip4:80.82.213.175 ip4:80.82.213.24 ip4:185.89.228.130 a mx include:spf.protection.outlook.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=100
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
10 records- SPFv=spf1 exists:%{i}.spf.hc318-95.eu.iphmx.com include:spf.nl2go.com ip4:80.82.213.175 ip4:80.82.213.24 ip4:185.89.228.130 a mx include:spf.protection.outlook.com -all
- yzgNmg+u13o19901C9QEiB5PwsXiOodh7tYfaW6wa70EmMLvxL9Svk1HapAJyooL8zbUmDdTuXXumq364b7EEg==
- _telesec-domain-validation=355982_2025-12-17_lEPC8xxedjzAekLyRcfbLdbBhoXxPPgtSZnqEYa9kxCPGvyXwd
- canva-site-verification=Tzxk8fd2Kojl7hEg0Wh6bQ
- MS=ms98373314
- ciscocidomainverification=198a32315fb2da132d638593893b0961d1df06506e187699eefa320a4ce33cb1
- google-site-verification=0Su7Ip1IjOI0QQG0vXNmp1l9UVjfZ0sDBgVdfTiIIos
- 298553_2022-01-02_MxR58AxdEexUeElyTas8wfMomi8bz4txv7Vg0uoN6fLcF3KWOM
- atlassian-domain-verification=VbYonlhhBMyvUG2m5BYhnUe2GnV7xsbMLQayTmSbKbhI+Irm/P0Zx1JEnTScTDn8
- apple-domain-verification=oqPMIk2b6YwrRVF5
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