definityfirst.com

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

Domain Overview

DNS: ⚡ live Checker: ⚡ live
definityfirst.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-20 21:12:31 UTC · ↺ Refresh

MX Hostnames

  • definityfirst-com.mail.protection.outlook.com

MX Priorities

No priority data.

A / AAAA Records

  • 15.197.225.128
  • 3.33.251.168

Mail Server IPs

No IPs resolved.

SOA Record

No SOA record found.

Nameservers (NS)

ns12.domaincontrol.com
ns11.domaincontrol.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:201.174.143.50 include:spf.protection.outlook.com include:497782.spf05.hubspotemail.net include:_spf.psm.knowbe4.com include:sendgrid.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1

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

All TXT Records

14 records
  • anthropic-domain-verification-8vgzr8=pzC2UwoV1pQHDFqP6UmypxwRd
  • mongodb-site-verification=E3DZY8kPj6TVn7m7pl5DPmp2KPaJgdhg
  • slack-domain-verification=hOXr742P0ElwsAWwHy3Q9XhYkOH1HYtdLEKxrhQW
  • EVoxubrDghuZxbzHnKJiwwXyhmaDWYd+bYaktBdlkNS8qrFxh7opLmvtFvEjSpSaJRaB375NFTbF/6LBeXPyWw==
  • MS=ms93562588
  • F2EA42541F
  • knowbe4-site-verification=886c737425ea7b492e5d001ef0d9d084
  • atlassian-domain-verification=sYtLvD3u279iQbhOVpr6tmVSgvgeo6FevHhREdSjenNG6tHwElhTixR5SQGeB5MK
  • google-site-verification=80uBrhZ8_8nONKzr7ojS_RSYjR6O9ZJXO02utIveuOY
  • d365mktkey=1azlqprnfmvmb35zmfsjbdzfb
  • SPFv=spf1 ip4:201.174.143.50 include:spf.protection.outlook.com include:497782.spf05.hubspotemail.net include:_spf.psm.knowbe4.com include:sendgrid.net -all
  • 1password-site-verification=TVT73DFDEZH2ZMYYNOQVL2YNBY
  • citrix-verification-code=92f502fe-117e-4426-ad2c-90f9748cdab3
  • IQZVPDWYV
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