udo.edu

Valid Email Server
Domain Lookup › udo.edu
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
udo.edu
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-07-27 19:02:45 UTC · ↺ Refresh

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MX Hostnames

  • esa4.itmc.tu-dortmund.de
  • esa3.itmc.tu-dortmund.de

MX Priorities

  • esa3.itmc.tu-dortmund.de: 10
  • esa4.itmc.tu-dortmund.de: 10

A / AAAA Records

  • 129.217.143.204 ↩ rst.etit.tu-dortmund.de

Mail Server IPs

  • 129.217.131.9 ↩ esa3.itmc.tu-dortmund.de
  • 2001:638:50d:2000::9 ↩ esa3.itmc.tu-dortmund.de
  • 129.217.131.14 ↩ esa4.itmc.tu-dortmund.de
  • 2001:638:50d:2000::14 ↩ esa4.itmc.tu-dortmund.de

SOA Record

Raw SOA ns0.itmc.tu-dortmund.de hostmaster.tu-dortmund.de 594977987 21600 3600 1728000 10800
Primary NS (mname)
ns0.itmc.tu-dortmund.de
Admin Email (rname)
hostmaster@tu-dortmund.de
Serial
594977987
Refresh
21600s
Retry
3600s
Expire
1728000s
Minimum TTL
10800s

Nameservers (NS)

ns2.itmc.tu-dortmund.de
ns1.itmc.tu-dortmund.de
dns-3.dfn.de

SPF Record

✓ Strict (-all)
v=spf1 ip4:129.217.4.40 ip4:129.217.128.0/24 ip4:129.217.131.0/24 ip6:2001:638:50D:2000::/64 ip4:93.190.66.6 ip4:185.134.242.25 -all
📊 DNS lookups: 0/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; 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

3 records
  • SPFv=spf1 ip4:129.217.4.40 ip4:129.217.128.0/24 ip4:129.217.131.0/24 ip6:2001:638:50D:2000::/64 ip4:93.190.66.6 ip4:185.134.242.25 -all
  • HARICA-CKNUjHxDiKrpfYWTPzX
  • MS=8D59A5BDA5285C9BCDB5BEDF624A6E39BADD3866
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