Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
polytron.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 16:46:20 UTC · ↺ Refresh
MX Hostnames
- mx00.ionos.de
- sslgate2.polytron.de
- mx01.ionos.de
MX Priorities
- mx00.ionos.de: 50
- sslgate2.polytron.de: 10
- mx01.ionos.de: 50
A / AAAA Records
- 217.160.0.126 ↩ 217-160-0-126.elastic-ssl.ui-r.com
Mail Server IPs
- 212.227.15.41 ↩ mx00.kundenserver.de
- 2.207.206.114 ↩ sslgate2.polytron.de
- 217.72.192.67 ↩ mx01.kundenserver.de
SOA Record
Raw SOA
ns3.kundenserver.de hostmaster.kundenserver.de 2016110547 28800 7200 604800 300
Primary NS (mname)
ns3.kundenserver.de
Admin Email (rname)
hostmaster@kundenserver.de
Serial
2016110547
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns3.kundenserver.de
ns4.kundenserver.de
SPF Record
✓ Soft Fail (~all)
v=spf1 mx include:spf.crsend.com ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- MS=6A4B14FB70D01845712B5D9CFAE9154F00456E67
- SPFv=spf1 mx include:spf.crsend.com ~all
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