Domain Overview
DNS: ✓ 1mo ago
Checker: ✓ 1mo ago
isp-netsystem.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-07 15:22:03 UTC · ↺ Refresh
MX Hostnames
- smx1.isp-netsystem.de
MX Priorities
- smx1.isp-netsystem.de: 10
A / AAAA Records
- 178.77.100.187 ↩ smx1.isp-netsystem.de
Mail Server IPs
- 178.77.100.187 ↩ smx1.isp-netsystem.de
SOA Record
Raw SOA
dns01.isp-services.de hostmaster.isp-netsystem.de 2025031509 600 600 600 600
Primary NS (mname)
dns01.isp-services.de
Admin Email (rname)
hostmaster@isp-netsystem.de
Serial
2025031509
Refresh
600s
Retry
600s
Expire
600s
Minimum TTL
600s
Nameservers (NS)
dns01.ispnetsystem.de
dns02.ispnetsystem.de
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:176.28.17.107 ip4:92.51.191.8 ip4:92.51.191.9 ip4:92.51.191.10 ip4:92.51.191.11 ip4:92.51.134.142 ip4:178.77.100.187 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;rua=mailto:[email protected];ruf=mailto:[email protected];fo=0:1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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- google-site-verification=xS5jxTKH0MOD3sXBCig6AlvoEuWqFVsKt5MpHw8M-Yc
- SPFv=spf1 mx ip4:176.28.17.107 ip4:92.51.191.8 ip4:92.51.191.9 ip4:92.51.191.10 ip4:92.51.191.11 ip4:92.51.134.142 ip4:178.77.100.187 -all
Full email verification for isp-netsystem.de
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