firstfloor.biz

Valid Email Server
Domain Lookup › firstfloor.biz

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
firstfloor.biz
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-23 16:25:14 UTC · ↺ Refresh

MX Hostnames

  • mx1-us1.ppe-hosted.com
  • mx2-us1.ppe-hosted.com
  • firstfloor-biz.mail.protection.outlook.com

MX Priorities

  • mx2-us1.ppe-hosted.com: 20
  • firstfloor-biz.mail.protection.outlook.com: 30
  • mx1-us1.ppe-hosted.com: 10

A / AAAA Records

  • 151.101.2.159

Mail Server IPs

  • 148.163.129.51 ↩ mx2-us1.ppe-hosted.com
  • 67.231.154.163 ↩ mx2-us1.ppe-hosted.com
  • 40.93.192.1 ↩ mail-dm5pr02cu00201.inbound.protection.outlook.com
  • 52.101.11.3 ↩ mail-sn1pr0501cu00103.inbound.protection.outlook.com
  • 52.101.8.42 ↩ mail-dm6pr03cu00402.inbound.protection.outlook.com
  • 52.101.9.12 ↩ mail-bl0pr05cu00504.inbound.protection.outlook.com
  • 2a01:111:f403:c931:: ↩ mail-sn1pr02cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:c902::3 ↩ mail-sj0pr03cu01703.inbound.protection.outlook.com
  • 2a01:111:f403:f903:: (no PTR)
  • 2a01:111:f403:c91d:: ↩ mail-mw2pr04cu00100.inbound.protection.outlook.com
  • 67.231.154.162
  • 148.163.129.50

SOA Record

Raw SOA ns13.worldnic.com namehost.worldnic.com 125092415 10800 3600 604800 3600
Primary NS (mname)
ns13.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125092415
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns13.worldnic.com
ns14.worldnic.com

SPF Record

✓ Soft Fail (~all)
v=spf1 a:dispatch-us.ppe-hosted.com include:spf.protection.outlook.com ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 2 found
selector1._domainkey
selector2._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

3 records
  • ppe-aae21fe53bea0faf9971cbaffb120b65df4fd305
  • SPFv=spf1 a:dispatch-us.ppe-hosted.com include:spf.protection.outlook.com ~all
  • MS=ms43484668
Free · No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for firstfloor.biz

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits