holdenassoc.com

Valid Email Server
Domain Lookup › holdenassoc.com

Domain Overview

DNS: ✓ 2d ago Checker: ✓ 2d ago
holdenassoc.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-19 07:58:20 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 141.193.213.20 (no PTR)
  • 141.193.213.21 (no PTR)

Mail Server IPs

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

SOA Record

Raw SOA ns3.worldnic.com namehost.worldnic.com 126031316 10800 3600 604800 3600
Primary NS (mname)
ns3.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
126031316
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns3.worldnic.com
ns4.worldnic.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 2 found
selector1._domainkey
selector2._domainkey
✓ DKIM properly configured for selector: selector1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

12 records
  • knowbe4-site-verification=e5fe26551e9fc821a03d9b95e825edc2
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • 4f771sefmp7jodjt449sftniri
  • iobgol2se5usln4tf11it5mg0h
  • monday-com-verification=3xFw1yJZMZn0EwTXhc7ZJ47693UqZkQQTx-YTQl5TkA
  • duo_sso_verification=0h5HuiMKK4dlQgd7YHyhdNU7V2TEPMdtBPLHzCoZ4qwWIXMTYPDXkONWT0ddQg93
  • MS=ms88769742
  • 0ed1fe018a2a269e5493bf4d83929941
  • t004slstaadfch8rr77pcqn968
  • c5rgt4f1faoge2hp6epfb1sr4o
  • SPFv=spf1 include:_netblocks.mimecast.com include:spf.protection.outlook.com ~all
  • bw=IYzy6izVwlF7DhmKvrIl8FSCCbTFKFpEK2Ytsduedq94
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