bonding.de

Valid Email Server
Domain Lookup › bonding.de

Domain Overview

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

Checked via [email protected] · 2026-03-21 06:43:25 UTC · ↺ Refresh

MX Hostnames

  • mx5.rz.rwth-aachen.de

MX Priorities

  • mx5.rz.rwth-aachen.de: 10

A / AAAA Records

  • 137.226.35.3 ↩ connections.bonding.de

Mail Server IPs

  • 137.226.78.58 ↩ mx5.rz.rwth-aachen.de

SOA Record

Raw SOA ns.bonding.de dnsmaster.bonding.de 2026011201 300 60 1209600 3600
Primary NS (mname)
ns.bonding.de
Admin Email (rname)
dnsmaster@bonding.de
Serial
2026011201
Refresh
300s
Retry
60s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

ns.bonding.de
nsb5.schlundtech.de

SPF Record

✗ Invalid
v=spf1 include:spf.protection.outlook.com include:_spf.itc.rwth-aachen.de ip4:134.169.12.140 ip4:134.169.192.135 ip4:134.130.7.8 ip4:134.130.0.0/16 ip4:134.169.0.0/16 a:groupware.tu-bs.de a:mailfront1.rz.tu-bs.de a:mailfront2.rz.tu-bs.de a:mailfront3.rz.tu-bs.de a:www-bonding.rz.rwth-aachen.de a:wbonding.ext.rz.tu-bs.de a:mailgw1.uni-kl.de a:mailgw2.uni-kl.de a:mailgw3.uni-kl.de a:mailgw4.uni-kl.de include:144207819.spf01.hubspotemail.net include:spf.postal.bonding.de -all
📊 DNS lookups: 14/10 — over limit!
⚠ Too many DNS lookups (14/10) — SPF will fail validation. Reduce include: statements.

DMARC Record

✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

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

2 records
  • MS=ms18585867
  • SPFv=spf1 include:spf.protection.outlook.com include:_spf.itc.rwth-aachen.de ip4:134.169.12.140 ip4:134.169.192.135 ip4:134.130.7.8 ip4:134.130.0.0/16 ip4:134.169.0.0/16 a:groupware.tu-bs.de a:mailfront1.rz.tu-bs.de a:mailfront2.rz.tu-bs.de a:mailfront3.rz.tu-bs.de a:www-bonding.rz.rwth-aachen.de a:wbonding.ext.rz.tu-bs.de a:mailgw1.uni-kl.de a:mailgw2.uni-kl.de a:mailgw3.uni-kl.de a:mailgw4.uni-kl.de include:144207819.spf01.hubspotemail.net include:spf.postal.bonding.de -all
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