collierseng.com

Valid Email Server
Domain Lookup › collierseng.com
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
collierseng.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-06-03 10:35:21 UTC · ↺ Refresh

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MX Hostnames

  • us-smtp-inbound-2.mimecast.com
  • us-smtp-inbound-1.mimecast.com

MX Priorities

  • us-smtp-inbound-1.mimecast.com: 10
  • us-smtp-inbound-2.mimecast.com: 10

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.132.242 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.132.141 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.128.141 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.132.221 ↩ us-smtp-inbound-2.mimecast.com

SOA Record

Raw SOA ns1-01.azure-dns.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1-01.azure-dns.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s

Nameservers (NS)

ns4-01.azure-dns.info
ns1-01.azure-dns.com
ns2-01.azure-dns.net
ns3-01.azure-dns.org

SPF Record

✓ Soft Fail (~all)
v=spf1 mx ip4:63.137.44.192/26 ip4:159.183.190.47 ip4:18.213.156.23 ip4:208.42.98.19 ip4:147.202.67.24 ip4:35.80.141.6 ip4:44.229.121.55 ip4:148.59.100.16/28 include:us._netblocks.mimecast.com include:mailgun.org ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

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

14 records
  • knowbe4-site-verification=a83431191cecb179d544845cec508bb7
  • smartsheet-site-validation=zshIML9m_aonVDjxHlNXVknFwOE7oQX-
  • cisco-ci-domain-verification=727b4b4d93f0413daec45f69e80699b7e508653d588102e3f41d50cadf17ef26
  • SPFv=spf1 mx ip4:63.137.44.192/26 ip4:159.183.190.47 ip4:18.213.156.23 ip4:208.42.98.19 ip4:147.202.67.24 ip4:35.80.141.6 ip4:44.229.121.55 ip4:148.59.100.16/28 include:us._netblocks.mimecast.com include:mailgun.org ~all
  • Y29sbGllcg==
  • MS=ms22912117
  • 5bicff1t719q7egfn8hhmg4dmk
  • m11i6spuc947jjra9n3h5110sm
  • vhhm52seuucog13ha8c7oiqlu5
  • ky4qrl3rty0gb6lg8z1mbgpd0z3dzj2h
  • ZOOM_verify_X8L1Qb4e3MgVAUE1w5rA2P
  • 0ed1fe018a0ee3531d7d864461942d07797d8c3bf0
  • apple-domain-verification=IREhuTPlLlGrPfsH
  • docusign=41c9665f-1804-4fb1-bdf9-04bbf35ab1d2
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