Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rh-koeln.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 10:07:19 UTC · ↺ Refresh
MX Hostnames
- rhkoeln-de0e.mail.protection.outlook.com
MX Priorities
- rhkoeln-de0e.mail.protection.outlook.com: 0
A / AAAA Records
- 199.60.103.187 (no PTR)
- 199.60.103.87 (no PTR)
Mail Server IPs
- 52.101.68.15 ↩ mail-db6pr03cu00107.inbound.protection.outlook.com
- 52.101.73.28 ↩ mail-am7pr05cu00204.inbound.protection.outlook.com
- 52.101.73.22 ↩ mail-am7pr05cu00106.inbound.protection.outlook.com
- 52.101.73.24 ↩ mail-as8pr05cu00300.inbound.protection.outlook.com
- 2a01:111:f403:ca04:: ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com
- 2a01:111:f403:ca09::8 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
SOA Record
Raw SOA
ans1.rh-koeln.de hostmaster.rh-koeln.de 2026032400 1200 120 1209600 3600
Primary NS (mname)
ans1.rh-koeln.de
Admin Email (rname)
hostmaster@rh-koeln.de
Serial
2026032400
Refresh
1200s
Retry
120s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
deneb.dfn.de
ans1.rh-koeln.de
ans2.rh-koeln.de
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:25250986.spf05.hubspotemail.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
mail._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
8 records- google-site-verification=_VTGTbYOZAvl4xXrqCaoT5FH9QPJDiFk_3Fsvr-pzlQ
- MS=ms28753038
- anny-verification=36c54c94-5e0b-408f-838e-a2042d482b6f
- HARICA-DJtrAGVHnJUQnxAvww7
- adobe-idp-site-verification=934e3408e51d196824596d7102a13ee03bbf30c280675e8ba67b8434a918d0ff
- SPFv=spf1 include:spf.protection.outlook.com include:25250986.spf05.hubspotemail.net -all
- anny-verification=4911627a-7643-45a0-9342-c5ee14554a68
- apple-domain-verification=ytA9hI1SJXQi5w0c
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