rku.de

Valid Email Server
Domain Lookup › rku.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
rku.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-23 11:46:06 UTC · ↺ Refresh

MX Hostnames

  • lili.uniklinik-ulm.de

MX Priorities

  • lili.uniklinik-ulm.de: 10

A / AAAA Records

  • 193.197.70.91 ↩ neo.uniklinik-ulm.de

Mail Server IPs

  • 193.197.70.20 ↩ lili.uniklinik-ulm.de

SOA Record

Raw SOA ns.ui-global-dns.de hostmaster.1und1.com 2017060130 28800 7200 604800 600
Primary NS (mname)
ns.ui-global-dns.de
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060130
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

ns.ui-global-dns.biz
ns.ui-global-dns.com
ns.ui-global-dns.org
ns.ui-global-dns.de

SPF Record

✓ Strict (-all)
v=spf1 a:mx.rku.de ip4:193.197.70.20 include:_spf3207.ppsmtp.net include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject;
✓ Reject — strongest protection
📋 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

14 records
  • MS=ms29272136
  • swisssign-check=FPcsnjtNaSKleUdAoZv-015PSdU
  • swisssign-check=3bpsF7LeB41Ugye4dOBFFvHOQHQ
  • google-site-verification=Iqcs9dwXPJ70ejgw3eDQSiee3gD5xj3eh4gm8pf7vJE
  • apple-domain-verification=6RaI3ULe0Vex3Yz6
  • swisssign-check=FSBxviCPwvdnlIGMOurJ_HvBU5U
  • swisssign-check=VyNowa2MvqYEQpJyNWsJR0FahXg
  • swisssign-check=U41fBNOxlb3-1E53ztLAMKcFbFA
  • MS=ms33449925
  • brevo-code:d132be287366d4653814bd386da5de1d
  • SPFv=spf1 a:mx.rku.de ip4:193.197.70.20 include:_spf3207.ppsmtp.net include:spf.protection.outlook.com -all
  • swisssign-check=s-TWqFYY5MbcPtx9KGt5rfiSGoU
  • MS=D9E115EA3F32474E923E03DDEC110EFD7372DD4A
  • mIbPNWeEFnoY8FObYuzG
Free · No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for rku.de

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits