fibercore.de

Valid Email Server
Domain Lookup › fibercore.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
fibercore.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-03 10:28:34 UTC · ↺ Refresh

MX Hostnames

  • fibercore-de.mail.protection.outlook.com

MX Priorities

  • fibercore-de.mail.protection.outlook.com: 10

A / AAAA Records

  • 217.17.192.98 ↩ parzival.iks-jena.de
  • 2001:4bd8::104:217:17:192:98 ↩ parzival.iks-jena.de

Mail Server IPs

  • 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
  • 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:ca27:: ↩ mail-beup281cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com

SOA Record

Raw SOA ns01.versatel.de hostmaster.versatel.de 2025011300 86400 28800 3600000 86400
Primary NS (mname)
ns01.versatel.de
Admin Email (rname)
hostmaster@versatel.de
Serial
2025011300
Refresh
86400s
Retry
28800s
Expire
3600000s
Minimum TTL
86400s

Nameservers (NS)

ns03.versatel.de
ns02.versatel.de
ns01.versatel.de

SPF Record

✓ Strict (-all)
v=spf1 a mx ip4:91.212.206.0/24 ip4:89.246.129.148/30 include:spf.protection.outlook.com include:spf.mail.iks-jena.de -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

6 records
  • MS=ms90498282
  • SPFv=spf1 a mx ip4:91.212.206.0/24 ip4:89.246.129.148/30 include:spf.protection.outlook.com include:spf.mail.iks-jena.de -all
  • MS=ms33485592
  • j-fiber GmbH Jena
  • Contact: [email protected]
  • Germany/Thur
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