mackayshields.com

Valid Email Server
Domain Lookup › mackayshields.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
mackayshields.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-20 21:26:44 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

  • us-smtp-inbound-1.mimecast.com: 4
  • us-smtp-inbound-2.mimecast.com: 2

A / AAAA Records

  • 104.21.10.216 (no PTR)
  • 172.67.131.188 (no PTR)
  • 2606:4700:3035::6815:ad8 (no PTR)
  • 2606:4700:3035::ac43:83bc (no PTR)

Mail Server IPs

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

SOA Record

Raw SOA deb.ns.cloudflare.com dns.cloudflare.com 2398137223 10000 2400 604800 1800
Primary NS (mname)
deb.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398137223
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

deb.ns.cloudflare.com
grant.ns.cloudflare.com

SPF Record

✓ Soft Fail (~all)
v=spf1 include:us._netblocks.mimecast.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
⚠ p=none — monitoring only, no enforcement
📋 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

10 records
  • MS=ms63738293
  • adobe-idp-site-verification=71d04042d7d98296d983f409ec5549bc43caccba17f4245eb2490cd58e399d99
  • apple-domain-verification=LeBivf5KYBaPQyIS
  • atlassian-domain-verification=QzTf1AL2eWQA3Dk5F/tYu+/s1p1VhxWxrIcdVyKvYkvZAu3oViDKAXirCcklU2zl
  • cisco-ci-domain-verification=24b887e20bb4d788d3c9bf37a73c1b518d441a9095aba59190d682b7ed068b04
  • duo_sso_verification=vDZpnBOTFM363RcVWbqZC0WkD5seUJg86NlAR1XDdBsyxH014jBLOTrEucR6zxwa
  • openai-domain-verification=dv-7krhc1YUls77cNXyQqej9cwN
  • openai-domain-verification=dv-BQTiWBxpUjjQReZAOZp0ZMlw
  • SPFv=spf1 include:us._netblocks.mimecast.com ~all
  • 8C+nfvxFsMAJw8mOLPoFBsTb3Xj5gt7lZa1CjnHFxE0xoeHN1FDiwdiMco3gauqCKZa18k2CcxYGyukk4wOpuA==
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