thw-koeln-ost.de

Valid Email Server
Domain Lookup › thw-koeln-ost.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
thw-koeln-ost.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-01 10:18:23 UTC · ↺ Refresh

MX Hostnames

  • baldur.onprosa.net

MX Priorities

  • baldur.onprosa.net: 20

A / AAAA Records

  • 144.76.88.72 ↩ ov-cms.thw.de

Mail Server IPs

  • 81.169.151.23 ↩ baldur.onprosa.net
  • 2a01:238:42d6:5500:b61d:25de:de2d:a48e ↩ baldur.onprosa.net

SOA Record

Raw SOA hydrogen.ns.hetzner.com dns.hetzner.com 2026020900 86400 10800 3600000 3600
Primary NS (mname)
hydrogen.ns.hetzner.com
Admin Email (rname)
dns@hetzner.com
Serial
2026020900
Refresh
86400s
Retry
10800s
Expire
3600000s
Minimum TTL
3600s

Nameservers (NS)

oxygen.ns.hetzner.com
helium.ns.hetzner.de
hydrogen.ns.hetzner.com

SPF Record

✓ Strict (-all)
v=spf1 +a +mx +a:baldur.onprosa.net -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 1 found
default._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

1 record
  • SPFv=spf1 +a +mx +a:baldur.onprosa.net -all
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