db3.io

Valid Email Server
Domain Lookup › db3.io

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
db3.io
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-23 07:21:01 UTC · ↺ Refresh

MX Hostnames

  • db3-io.mail.protection.outlook.com

MX Priorities

  • db3-io.mail.protection.outlook.com: 1

A / AAAA Records

  • 23.236.62.147 ↩ 147.62.236.23.bc.googleusercontent.com
  • 107.161.23.204 ↩ parking.namesilo.com
  • 198.251.81.30
  • 209.141.38.71

Mail Server IPs

  • 52.101.40.0 ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
  • 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
  • 52.101.11.19 ↩ mail-sa9pr04cu00203.inbound.protection.outlook.com
  • 52.101.10.1 ↩ mail-bn6pr02cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:f902::1 ↩ mail-bl2pr02cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:c927::1 ↩ mail-bn8pr05cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:f902::2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:f909:: ↩ mail-bn6pr04cu00200.inbound.protection.outlook.com

SOA Record

Raw SOA premium-ns1.dnsowl.com hostmaster.dnsowl.com 1746707947 7200 1800 1209600 600
Primary NS (mname)
premium-ns1.dnsowl.com
Admin Email (rname)
hostmaster@dnsowl.com
Serial
1746707947
Refresh
7200s
Retry
1800s
Expire
1209600s
Minimum TTL
600s

Nameservers (NS)

premium-ns2.dnsowl.com
premium-ns3.dnsowl.com
premium-ns1.dnsowl.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

✗ 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

2 records
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • MS=ms96961059
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 db3.io

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

No credit card required
Get 1,000 Free Credits