bku.de

Valid Email Server
Domain Lookup › bku.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
bku.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-04-01 08:58:19 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 91.216.248.21 ↩ frontend.lima-city.de
  • 91.216.248.20 ↩ frontend.lima-city.de
  • 91.216.248.22
  • 2a00:f48:2000:affe:fe00::10
  • 2a00:f48:2000:affe:fe00::30
  • 2a00:f48:2000:affe:fe00::20

Mail Server IPs

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

SOA Record

Raw SOA ns.inwx.de hostmaster.inwx.de 2025050200 10800 3600 1209600 3600
Primary NS (mname)
ns.inwx.de
Admin Email (rname)
hostmaster@inwx.de
Serial
2025050200
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

ns.inwx.de
ns3.inwx.eu
ns2.inwx.de

SPF Record

✓ Soft Fail (~all)
v=spf1 a mx include:vereinonline.org a:mx2.sharkness.de ip4:91.216.248.21 ip4:91.216.248.22 ip4:91.216.248.20 ip4:217.72.192.74 ip4:176.95.251.39 ip4:176.94.77.101/20 include:_spf.on.services include:spf.protection.outlook.com ~all
📊 DNS lookups: 6/10
~ Soft fail (~all) — moderate 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

1 record
  • SPFv=spf1 a mx include:vereinonline.org a:mx2.sharkness.de ip4:91.216.248.21 ip4:91.216.248.22 ip4:91.216.248.20 ip4:217.72.192.74 ip4:176.95.251.39 ip4:176.94.77.101/20 include:_spf.on.services include:spf.protection.outlook.com ~all
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