Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rs-computersysteme.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 11:46:13 UTC · ↺ Refresh
MX Hostnames
- mail01.it-box.de
MX Priorities
- mail01.it-box.de: 10
A / AAAA Records
- 94.130.252.103 ↩ mail01.it-box.de
Mail Server IPs
- 94.130.252.103 ↩ mail01.it-box.de
SOA Record
Raw SOA
a.ns14.net support.it-box.de 2025121207 7200 3600 604800 43200
Primary NS (mname)
a.ns14.net
Admin Email (rname)
support@it-box.de
Serial
2025121207
Refresh
7200s
Retry
3600s
Expire
604800s
Minimum TTL
43200s
Nameservers (NS)
c.ns14.net
b.ns14.net
d.ns14.net
a.ns14.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:94.130.252.103 ip4:138.201.110.241 include:mail01.it-box.de -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=quarantine; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
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 ip4:94.130.252.103 ip4:138.201.110.241 include:mail01.it-box.de -all
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