Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
zerberus-steuerberatung.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 20:43:09 UTC · ↺ Refresh
MX Hostnames
- mx02.hornetsecurity.com
- mx03.hornetsecurity.com
- mx04.hornetsecurity.com
- mx01.hornetsecurity.com
MX Priorities
- mx03.hornetsecurity.com: 30
- mx01.hornetsecurity.com: 10
- mx02.hornetsecurity.com: 20
- mx04.hornetsecurity.com: 40
A / AAAA Records
- 217.160.0.129 ↩ 217-160-0-129.elastic-ssl.ui-r.com
- 2001:8d8:100f:f000::2cc ↩ 2001-08d8-100f-f000-0000-0000-0000-02cc.elastic-ssl.ui-r.com
Mail Server IPs
- 94.100.134.8 ↩ mx03.hornetsecurity.com
- 94.100.132.8 ↩ mx01.hornetsecurity.com
- 94.100.136.8 ↩ mx02.hornetsecurity.com
- 94.100.136.7 ↩ mx04.hornetsecurity.com
SOA Record
Raw SOA
ns1019.ui-dns.org hostmaster.1und1.com 2017060131 28800 7200 604800 600
Primary NS (mname)
ns1019.ui-dns.org
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060131
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns1109.ui-dns.com
ns1047.ui-dns.de
ns1019.ui-dns.org
ns1104.ui-dns.biz
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf-eu.ionos.com include:_spf.strato.com include:spf.hornetsecurity.com include:spf.protection.outlook.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; rf=afrf; sp=none; ri=86400; adkim=r; aspf=s
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: none
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- facebook-domain-verification=xit49xj5dj3h2yddzruvi2m5bc1145
- SPFv=spf1 include:_spf-eu.ionos.com include:_spf.strato.com include:spf.hornetsecurity.com include:spf.protection.outlook.com ~all
- google-site-verification=2Dt36gNHDZD58nDDJQALyNTz1IlPCVJ51Xnw8x2Xt-Y
- MS=ms72990191
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