bluebiotech.de

Valid Email Server
Domain Lookup › bluebiotech.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
bluebiotech.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-24 18:59:59 UTC · ↺ Refresh

MX Hostnames

  • mx01.hornetsecurity.com
  • mx02.hornetsecurity.com
  • mx04.hornetsecurity.com
  • mx03.hornetsecurity.com

MX Priorities

  • mx04.hornetsecurity.com: 40
  • mx03.hornetsecurity.com: 30
  • mx01.hornetsecurity.com: 10
  • mx02.hornetsecurity.com: 20

A / AAAA Records

  • 217.160.0.247 ↩ 217-160-0-247.elastic-ssl.ui-r.com
  • 2001:8d8:100f:f000::2b8 ↩ 2001-08d8-100f-f000-0000-0000-0000-02b8.elastic-ssl.ui-r.com

Mail Server IPs

  • 94.100.136.7 ↩ mx04.hornetsecurity.com
  • 94.100.134.8 ↩ mx03.hornetsecurity.com
  • 94.100.132.8 ↩ mx01.hornetsecurity.com
  • 94.100.136.8 ↩ mx02.hornetsecurity.com

SOA Record

Raw SOA ns1120.ui-dns.biz hostmaster.1and1.com 2018051136 28800 7200 604800 300
Primary NS (mname)
ns1120.ui-dns.biz
Admin Email (rname)
hostmaster@1and1.com
Serial
2018051136
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1111.ui-dns.com
ns1040.ui-dns.de
ns1120.ui-dns.biz
ns1052.ui-dns.org

SPF Record

✓ Strict (-all)
v=spf1 mx ip4:80.155.42.130 ip4:80.155.42.132 ip4:80.155.42.134 include:spf.protection.outlook.com include:spf.hornetsecurity.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

4 records
  • _bjaiw2ew5blb8rtanj9y08vl2hne4h4
  • MS=ms23289799
  • SPFv=spf1 mx ip4:80.155.42.130 ip4:80.155.42.132 ip4:80.155.42.134 include:spf.protection.outlook.com include:spf.hornetsecurity.com -all
  • HXz1dmxpQ4jbRRFCqbetyb2yqO3atcxc0WEKvVEuA0D13UxQh5ogc/NQs/cPeiOjhlMRAWE3tLOhGBFW6zyCkw==
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