tu-dortmund.de

Valid Email Server
Domain Lookup › tu-dortmund.de

Domain Overview

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

Checked via [email protected] · 2026-03-21 06:38:15 UTC · ↺ Refresh

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

  • 129.217.205.11 ↩ DomainDnsZones.tu-dortmund.de
  • 129.217.205.13 ↩ ForestDnsZones.tu-dortmund.de
  • 129.217.205.12 ↩ dc2.tu-dortmund.de
  • 2001:638:50d:202a::11 ↩ ForestDnsZones.tu-dortmund.de
  • 2001:638:50d:202a::12 ↩ dc2.tu-dortmund.de
  • 2001:638:50d:202a::13 ↩ DomainDnsZones.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 595013067 21600 3600 1728000 10800
Primary NS (mname)
ns0.itmc.tu-dortmund.de
Admin Email (rname)
hostmaster@tu-dortmund.de
Serial
595013067
Refresh
21600s
Retry
3600s
Expire
1728000s
Minimum TTL
10800s

Nameservers (NS)

dns-3.dfn.de
ns2.itmc.tu-dortmund.de
secondary.rrze.uni-erlangen.de
ns1.itmc.tu-dortmund.de

SPF Record

✓ Strict (-all)
v=spf1 ip4:93.190.66.6 ip4:129.217.4.40 ip4:129.217.128.0/24 ip4:129.217.131.0/24 ip4:195.66.99.135 ip4:62.75.247.44 ip4:212.227.89.57 ip4:217.160.226.166 ip4:82.165.193.1 ip4:85.25.144.9 ip4:54.194.192.132 ip4:87.79.30.25 ip4:87.79.30.30 ip4:91.217.141.0/24 ip4:128.176.118.0/25 ip4:129.217.231.64/26 ip4:185.134.242.25 ip6:2001:638:50D:2000::/64 ip4:77.220.249.219 ip4:129.217.255.0/25 include:spf-eu.exlibrisgroup.com include:spf.crsend.com ip4:95.130.22.100 ip6:2a02:2940:0:c007::100 -all
📊 DNS lookups: 2/10
✓ 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

9 records
  • apple-domain-verification=bENlU0mSxvfZqD6w
  • MS=58A38069D5572941D477C5866498835FE30B0CB9
  • bw=vrCirunrnvC8weAAQY3xf2h0A77xWToIL59YJHIKSNDb
  • _telesec-domain-validation=355015_2025-11-13_I72vZFoKGvUyVawuzQedhLrfxUnByw30lg9E96y3p9RO8A43bl
  • SPFv=spf1 ip4:93.190.66.6 ip4:129.217.4.40 ip4:129.217.128.0/24 ip4:129.217.131.0/24 ip4:195.66.99.135 ip4:62.75.247.44 ip4:212.227.89.57 ip4:217.160.226.166 ip4:82.165.193.1 ip4:85.25.144.9 ip4:54.194.192.132 ip4:87.79.30.25 ip4:87.79.30.30 ip4:91.217.141.0/24 ip4:128.176.118.0/25 ip4:129.217.231.64/26 ip4:185.134.242.25 ip6:2001:638:50D:2000::/64 ip4:77.220.249.219 ip4:129.217.255.0/25 include:spf-eu.exlibrisgroup.com include:spf.crsend.com ip4:95.130.22.100 ip6:2a02:2940:0:c007::100 -all
  • adobe-idp-site-verification=3abae3246555f1134e1b6c8b2f8852728214ab60db683727bb86d17e00daafb3
  • docusign=b3fe92af-ecbb-4be5-a240-d2eaa3469a0f
  • MS=ms16408126
  • google-site-verification=lC7DdPPX34o9IW6Fu3VPyEWUJVWOFgJ-cmu4Gl-CDxo
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