blb-karlsruhe.de

Valid Email Server
Domain Lookup › blb-karlsruhe.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
blb-karlsruhe.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-04 22:13:53 UTC · ↺ Refresh

MX Hostnames

  • mx1.belwue.de
  • mx4.belwue.de
  • mx3.belwue.de
  • mx2.belwue.de

MX Priorities

  • mx3.belwue.de: 10
  • mx1.belwue.de: 10
  • mx2.belwue.de: 10
  • mx4.belwue.de: 10

A / AAAA Records

  • 193.197.86.221 ↩ www.blb-karlsruhe.de

Mail Server IPs

  • 129.143.76.3 ↩ mail-in03.belwue.de
  • 2001:7c0::76:0:0:0:3 ↩ mail-in03.belwue.de
  • 129.143.76.2 ↩ mail-in02.belwue.de
  • 129.143.76.1 ↩ mail-in01.belwue.de
  • 2001:7c0::76:0:0:0:2 ↩ mail-in02.belwue.de
  • 2001:7c0::76:0:0:0:1 ↩ mail-in01.belwue.de
  • 129.143.76.4 ↩ mail-in04.belwue.de
  • 2001:7c0::76:0:0:0:4 ↩ mail-in04.belwue.de

SOA Record

Raw SOA dns1.blb-karlsruhe.de administrator.blb-karlsruhe.de 2026030385 3600 600 1209600 3600
Primary NS (mname)
dns1.blb-karlsruhe.de
Admin Email (rname)
administrator@blb-karlsruhe.de
Serial
2026030385
Refresh
3600s
Retry
600s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

dns1.blb-karlsruhe.de
dns3.belwue.de
dns5.belwue.de
dns1.belwue.de

SPF Record

✓ Strict (-all)
v=spf1 a:mail.blb-karlsruhe.de a:mailgw.blb-karlsruhe.de ip4:193.197.86.3 ip4:193.197.86.30 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1;p=reject;rua=mailto:[email protected];ruf=mailto:[email protected];fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

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
  • MS=6209B949AFAC4B6A0317619D1CF451312690AD23
  • google-site-verification=N7oRe83oloM7DpcK3kOy41t4C8LX4E1DvMx9Iy2Iw34
  • SPFv=spf1 a:mail.blb-karlsruhe.de a:mailgw.blb-karlsruhe.de ip4:193.197.86.3 ip4:193.197.86.30 -all
  • HARICA-iSajfFch4isVhmnsrts
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