uni-flensburg.de

Valid Email Server
Domain Lookup › uni-flensburg.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
uni-flensburg.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-04 14:08:45 UTC · ↺ Refresh

MX Hostnames

  • mx1-ext.uni-flensburg.de
  • mx2-ext.uni-flensburg.de

MX Priorities

  • mx2-ext.uni-flensburg.de: 20
  • mx1-ext.uni-flensburg.de: 10

A / AAAA Records

  • 193.174.11.100 (no PTR)

Mail Server IPs

  • 193.174.11.244 ↩ mx2-ext.uni-flensburg.de
  • 193.174.11.243 ↩ mx1-ext.uni-flensburg.de

SOA Record

Raw SOA dragon.int.uni-flensburg.de hostmaster.uni-flensburg.de 2016121808 10800 3600 2592000 3600
Primary NS (mname)
dragon.int.uni-flensburg.de
Admin Email (rname)
hostmaster@uni-flensburg.de
Serial
2016121808
Refresh
10800s
Retry
3600s
Expire
2592000s
Minimum TTL
3600s

Nameservers (NS)

jupiter.uni-flensburg.de
dns-2.dfn.de
cinnamon.uni-flensburg.de

SPF Record

✓ Strict (-all)
v=spf1 mx:mx1-ext.uni-flensburg.de mx:mx2-ext.uni-flensburg.de ip4:193.174.11.243 ip4:193.174.11.244 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

7 records
  • DMARCv=DMARC1;p=quarantine;pct=100;rua=mailto:[email protected]
  • MS=2D99EA32E7E2466F7CA787354345C8205FE0AE6B
  • SPFv=spf1 mx:mx1-ext.uni-flensburg.de mx:mx2-ext.uni-flensburg.de ip4:193.174.11.243 ip4:193.174.11.244 -all
  • cisco-ci-domain-verification=5f699dca14171d64ae20863f4471c6c607d8ad98223418c3deb01dcef146d1e0
  • abuseipdb-verification=ziEDdVIV
  • apple-domain-verification=5FjNXY8zc1KJhGq1
  • anny-verification=38a876da-2ed2-4bb5-98b3-0bb875e311f1
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 uni-flensburg.de

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

No credit card required
Get 1,000 Free Credits