Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
koester-itbc.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-03 10:52:43 UTC · ↺ Refresh
MX Hostnames
- koesteritbc-de01i.mail.protection.outlook.com
MX Priorities
- koesteritbc-de01i.mail.protection.outlook.com: 0
A / AAAA Records
- 217.160.0.55 ↩ 217-160-0-55.elastic-ssl.ui-r.com
- 2001:8d8:100f:f000::26c ↩ 2001-08d8-100f-f000-0000-0000-0000-026c.elastic-ssl.ui-r.com
Mail Server IPs
- 52.101.68.10 ↩ mail-dbbpr03cu00102.inbound.protection.outlook.com
- 52.101.73.153 ↩ mail-as8pr05cu00401.inbound.protection.outlook.com
- 52.101.68.36 ↩ mail-db5pr02cu00104.inbound.protection.outlook.com
- 52.101.68.18 ↩ mail-db4pr02cu00302.inbound.protection.outlook.com
- 2a01:111:f403:ca04::e ↩ mail-db8pr02cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca09::e ↩ mail-am7pr05cu00206.inbound.protection.outlook.com
- 2a01:111:f403:ca04::7 ↩ mail-db4pr02cu00307.inbound.protection.outlook.com
- 2a01:111:f403:ca09::3 ↩ mail-am6pr04cu00303.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1063.ui-dns.com hostmaster.1und1.de 2017071264 28800 7200 604800 300
Primary NS (mname)
ns1063.ui-dns.com
Admin Email (rname)
hostmaster@1und1.de
Serial
2017071264
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns1063.ui-dns.com
ns1063.ui-dns.de
ns1063.ui-dns.biz
ns1063.ui-dns.org
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.perfora.net include:_spf-eu.ionos.com include:_spf.kundenserver.de include:spf.protection.outlook.com include:_spf.protection.outlook.com ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 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
1 record- SPFv=spf1 include:_spf.perfora.net include:_spf-eu.ionos.com include:_spf.kundenserver.de include:spf.protection.outlook.com include:_spf.protection.outlook.com ~all
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