Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ubg-medienzentrum.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 13:53:59 UTC · ↺ Refresh
MX Hostnames
- mail48.cdu.de
MX Priorities
- mail48.cdu.de: 5
A / AAAA Records
- 193.219.105.17 (no PTR)
Mail Server IPs
- 193.219.105.48 ↩ mail48.cdu.de
SOA Record
Raw SOA
ns1.ubgnet.de root.ns1.ubgnet.de 2024120901 21600 1800 604800 3600
Primary NS (mname)
ns1.ubgnet.de
Admin Email (rname)
root@ns1.ubgnet.de
Serial
2024120901
Refresh
21600s
Retry
1800s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns1.ubgnet.de
pns.dtag.de
secondary006.dtag.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:193.219.105.0/24 ip4:193.17.243.2 ip4:82.135.18.48 a:mailout01.t-online.de a:mail-fr1ger01on0069.outbound.protection.outlook.de -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 ip4:193.219.105.0/24 ip4:193.17.243.2 ip4:82.135.18.48 a:mailout01.t-online.de a:mail-fr1ger01on0069.outbound.protection.outlook.de -all
- MS=94752278
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