groupbuilders.net

Valid Email Server
Domain Lookup › groupbuilders.net

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
groupbuilders.net
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-28 00:33:05 UTC · ↺ Refresh

MX Hostnames

  • smtp.xenpost.com

MX Priorities

  • smtp.xenpost.com: 10

A / AAAA Records

  • 162.159.137.9 (no PTR)

Mail Server IPs

  • 205.172.3.211 ↩ mx1.xenpost.com
  • 205.172.3.212 ↩ mx2.xenpost.com

SOA Record

Raw SOA ns41.worldnic.com namehost.worldnic.com 125050213 10800 3600 604800 3600
Primary NS (mname)
ns41.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125050213
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns41.worldnic.com
ns42.worldnic.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:104.241.64.66/32 ip4:104.241.64.67/32 include:SMTP.Xenpost.com include:mail.groupbuilders.net include:mail2.groupbuilders.net -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

2 records
  • SPFv=spf1 ip4:104.241.64.66/32 ip4:104.241.64.67/32 include:SMTP.Xenpost.com include:mail.groupbuilders.net include:mail2.groupbuilders.net -all
  • g9fbp2u3bnltvsba855ohqcnuu
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