unitedcontractors.com

Valid Email Server
Domain Lookup › unitedcontractors.com

Domain Overview

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

Checked via [email protected] · 2026-03-23 08:38:06 UTC · ↺ Refresh

MX Hostnames

  • mx1.improvmx.com
  • mx2.improvmx.com

MX Priorities

  • mx2.improvmx.com: 20
  • mx1.improvmx.com: 10

A / AAAA Records

  • 52.20.84.62

Mail Server IPs

  • 15.236.61.92 ↩ ec2-15-236-61-92.eu-west-3.compute.amazonaws.com
  • 13.36.222.39 ↩ ec2-13-36-222-39.eu-west-3.compute.amazonaws.com
  • 13.36.107.63 ↩ ec2-13-36-107-63.eu-west-3.compute.amazonaws.com
  • 2a05:d012:412:e201:1f6e:f6e4:8fd7:4678 (no PTR)
  • 2a05:d012:412:e202:e81e:cc44:3b53:8a3d (no PTR)
  • 2a05:d012:412:e203:7e33:3d9c:28d7:ee20 (no PTR)
  • 13.37.195.136 ↩ ec2-13-37-195-136.eu-west-3.compute.amazonaws.com
  • 15.236.236.160 ↩ ec2-15-236-236-160.eu-west-3.compute.amazonaws.com
  • 35.181.18.45 ↩ ec2-35-181-18-45.eu-west-3.compute.amazonaws.com
  • 2a05:d012:412:e202:f36:2c1f:1a49:d38a (no PTR)
  • 2a05:d012:412:e201:88aa:e7b9:7a43:12d7
  • 2a05:d012:412:e203:373a:f51a:4a85:1d25

SOA Record

Raw SOA ns1.atom.com hostmaster.unitedcontractors.com 2026031803 10800 3600 604800 3600
Primary NS (mname)
ns1.atom.com
Admin Email (rname)
hostmaster@unitedcontractors.com
Serial
2026031803
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns1.atom.com
ns2.atom.com

SPF Record

✓ Soft Fail (~all)
v=spf1 include:spf.improvmx.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate 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

1 record
  • SPFv=spf1 include:spf.improvmx.com ~all
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