tu-harburg.de

Valid Email Server
Domain Lookup › tu-harburg.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
tu-harburg.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-02 11:45:55 UTC · ↺ Refresh

MX Hostnames

  • smtp3.rz.tu-harburg.de
  • smtp4.rz.tu-harburg.de
  • smtp5.rz.tu-harburg.de

MX Priorities

  • smtp5.rz.tu-harburg.de: 15
  • smtp3.rz.tu-harburg.de: 25
  • smtp4.rz.tu-harburg.de: 5

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 134.28.205.35 ↩ smtp5.rz.tu-harburg.de
  • 2001:638:702:20aa::205:35 ↩ smtp5.rz.tu-harburg.de
  • 134.28.205.37 ↩ smtp3.rz.tu-harburg.de
  • 2001:638:702:20aa::205:37 ↩ smtp3.rz.tu-harburg.de
  • 134.28.205.34 ↩ smtp4.rz.tu-harburg.de
  • 2001:638:702:20aa::205:34 ↩ smtp4.rz.tu-harburg.de

SOA Record

Raw SOA authdns1.rz.tuhh.de hostmaster.tuhh.de 2026040200 10000 5000 3600000 3600
Primary NS (mname)
authdns1.rz.tuhh.de
Admin Email (rname)
hostmaster@tuhh.de
Serial
2026040200
Refresh
10000s
Retry
5000s
Expire
3600000s
Minimum TTL
3600s

Nameservers (NS)

authdns1.rz.tuhh.de
authdns2.rz.tuhh.de
dns-2.dfn.de

SPF Record

✓ Soft Fail (~all)
v=spf1 redirect=_spf.tuhh.de
📊 DNS lookups: 1/10

DMARC Record

✗ p=none
v=DMARC1; p=none; pct=100; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 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

1 record
  • SPFv=spf1 redirect=_spf.tuhh.de
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