Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
horstmannfis.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 21:33:22 UTC · ↺ Refresh
MX Hostnames
- mx2.hc6805-81.iphmx.com
- mx1.hc6805-81.iphmx.com
MX Priorities
- mx2.hc6805-81.iphmx.com: 10
- mx1.hc6805-81.iphmx.com: 10
A / AAAA Records
- 13.107.246.40 (no PTR)
- 13.107.213.40 (no PTR)
Mail Server IPs
- 68.232.154.176 ↩ esa.hc6805-81.iphmx.com
- 68.232.146.20 ↩ esa.hc6805-81.iphmx.com
SOA Record
Raw SOA
ns1-34.azure-dns.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1-34.azure-dns.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns2-34.azure-dns.net
ns3-34.azure-dns.org
ns4-34.azure-dns.info
ns1-34.azure-dns.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:206.210.0.0/19 include:sendgrid.net exists:%{i}.spf.hc6806-15.iphmx.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 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
1 record- SPFv=spf1 ip4:206.210.0.0/19 include:sendgrid.net exists:%{i}.spf.hc6806-15.iphmx.com -all
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