polardesign.com

Valid Email Server
Domain Lookup › polardesign.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
polardesign.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-29 02:26:47 UTC · ↺ Refresh

MX Hostnames

  • mail.insight-builder.com
  • zimbra1.insight-builder.com

MX Priorities

  • mail.insight-builder.com: 10
  • zimbra1.insight-builder.com: 10

A / AAAA Records

  • 40.143.5.132 (no PTR)

Mail Server IPs

  • 40.143.5.131 ↩ zimbra1.insight-builder.com

SOA Record

Raw SOA ns.insight-builder.com hostmaster.insight-builder.com 2025121803 900 600 604800 900
Primary NS (mname)
ns.insight-builder.com
Admin Email (rname)
hostmaster@insight-builder.com
Serial
2025121803
Refresh
900s
Retry
600s
Expire
604800s
Minimum TTL
900s

Nameservers (NS)

d.pro.ns.buddydns.com
i.pro.ns.buddydns.com
e.pro.ns.buddydns.com
uz5qfm8n244kn4qz8mh437w9kzvpudduwyldp5361v9n0vh8sx5ucu.pro.ns.buddyns.com
ns2.insight-builder.com
uz53c7fwlc89h7jrbxcsnxfwjw8k6jtg56l4yvhm6p2xf496c0xl40.pro.ns.buddyns.com
uz588h0rhwuu3cc03gm9uckw0w42cqr459wn1nxrbzhym2wd81zydb.pro.ns.buddyns.com
ns.insight-builder.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:66.181.94.129 ip4:66.181.94.150 ip4:66.181.94.68 ip4:66.181.94.69 ip4:40.143.5.131 a mx -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✗ None detected

No 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

4 records
  • twilio-domain-verification=4691e7c97f0e1e8d58bd6c86d33a4722
  • google-site-verification=QSwy3Q2q7i4VUmHJZT5Zi3UlhdhwF2a40icjTzCo83Q
  • SPFv=spf1 ip4:66.181.94.129 ip4:66.181.94.150 ip4:66.181.94.68 ip4:66.181.94.69 ip4:40.143.5.131 a mx -all
  • MS=DB1F2CB1CB3861921901B7312E35E0E15B84DD44
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