Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
wrk-duisburg.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-03 19:33:23 UTC · ↺ Refresh
MX Hostnames
- mail.wrk-duisburg.de
MX Priorities
- mail.wrk-duisburg.de: 10
A / AAAA Records
- 195.242.103.230 ↩ server800.serverconfig.center
Mail Server IPs
- 195.242.103.230 ↩ server800.serverconfig.center
SOA Record
Raw SOA
ns1.start-dns.de webmaster.wrk-duisburg.de 2021092101 14400 3600 604800 3600
Primary NS (mname)
ns1.start-dns.de
Admin Email (rname)
webmaster@wrk-duisburg.de
Serial
2021092101
Refresh
14400s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns2.start-dns.de
ns3.start-dns.de
ns1.start-dns.de
SPF Record
✓ Strict (-all)
v=spf1 +a +mx +a:server800.serverconfig.center include:spf.antispamcloud.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=20; ruf=mailto:[email protected]; fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
⚠ Policy applies to 20% of failing messages only
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:server800.serverconfig.center include:spf.antispamcloud.com -all
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