Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
trefzger-immobilien.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 00:32:09 UTC · ↺ Refresh
MX Hostnames
- server1.a4w.info
MX Priorities
- server1.a4w.info: 10
A / AAAA Records
- 217.160.184.51 ↩ server1.a4w.info
Mail Server IPs
- 217.160.184.51 ↩ server1.a4w.info
- 2001:8d8:974:c000::85:90bd ↩ server1.a4w.info
SOA Record
Raw SOA
nsa6.schlundtech.de info.art-4-web.de 2025100103 43200 7200 1209600 600
Primary NS (mname)
nsa6.schlundtech.de
Admin Email (rname)
info@art-4-web.de
Serial
2025100103
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
600s
Nameservers (NS)
nsd6.schlundtech.de
nsc6.schlundtech.de
nsb6.schlundtech.de
nsa6.schlundtech.de
SPF Record
✓ Strict (-all)
v=spf1 ip4:217.160.184.51 mx -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; adkim=s; aspf=s; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; pct=100
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
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 ip4:217.160.184.51 mx -all
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