1stresponseplumbing.com

Valid Email Server
Domain Lookup › 1stresponseplumbing.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
1stresponseplumbing.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-18 07:14:23 UTC · ↺ Refresh

MX Hostnames

  • 1stresponseplumbing-com.mail.eo.outlook.com

MX Priorities

  • 1stresponseplumbing-com.mail.eo.outlook.com: 0

A / AAAA Records

  • 134.215.240.19 ↩ h134-215-240-19.spkqwa.dedicated.static.tds.net

Mail Server IPs

  • 52.101.42.14 ↩ mail-mw2pr04cu00106.inbound.protection.outlook.com
  • 52.101.40.1 ↩ mail-cy4pr03cu00101.inbound.protection.outlook.com
  • 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
  • 52.101.41.6 ↩ mail-sj0pr03cu01406.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::1 ↩ mail-dm6pr03cu00401.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com
  • 2a01:111:f403:f903:: (no PTR)
  • 2a01:111:f403:c922:: ↩ mail-bl0pr03cu00200.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.dynu.com administrator.dynu.com 45 3600 900 604800 300
Primary NS (mname)
ns1.dynu.com
Admin Email (rname)
administrator@dynu.com
Serial
45
Refresh
3600s
Retry
900s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1.dynu.com
ns6.dynu.com
ns5.dynu.com
ns4.dynu.com
ns3.dynu.com
ns2.dynu.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=94D327C790E01FFD0BC0B0614FC5A8752D5CCEC7
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 1stresponseplumbing.com

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

No credit card required
Get 1,000 Free Credits