4s.com

Valid Email Server
Domain Lookup › 4s.com
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
4s.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-21 08:53:18 UTC · ↺ Refresh

MX Hostnames

  • mx0a-0015a301.pphosted.com
  • mxa-0015a301.gslb.pphosted.com
  • mx0b-0015a301.pphosted.com
  • mxb-0015a301.gslb.pphosted.com

MX Priorities

No priority data.

A / AAAA Records

  • 104.20.16.247
  • 172.66.146.58
  • 2606:4700:10::6814:10f7
  • 2606:4700:10::ac42:923a

Mail Server IPs

No IPs resolved.

SOA Record

No SOA record found.

Nameservers (NS)

lindsey.ns.cloudflare.com
art.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:107.20.210.250 ip4:52.1.14.157 ip4:67.231.145.233 ip4:67.231.152.254 ip4:65.164.43.80 a mx include:spf-0015a301.pphosted.com include:servers.mcsv.net include:mercurygate.net include:spf.protection.outlook.com include:spfhost.messageprovider.com -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; fo=1; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]

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

9 records
  • bfw5qpr1gyv2gw7f8d42zn5p3qptrqtq
  • v6g9p0gvdlzb276w852rcvwl1vjrlhbv
  • SPFv=spf1 ip4:107.20.210.250 ip4:52.1.14.157 ip4:67.231.145.233 ip4:67.231.152.254 ip4:65.164.43.80 a mx include:spf-0015a301.pphosted.com include:servers.mcsv.net include:mercurygate.net include:spf.protection.outlook.com include:spfhost.messageprovider.com -all
  • 2fct4dtjtzd1g32slhp246j0p18mwd3c
  • 8w2sGwft27pu7c79UIINgKuhkQGHZZ8qP0hrSJr9udZdsS8hHUPNJnQvyVZAyj9ycLSzi19XfWJApzdiIc5ZOg==
  • MS=ms70570033
  • ZOOM_verify_rpSVDjl69RWEg8kSeLATtD
  • _6sj6gp58o36ggkxptc0o8kxeomdagso
  • _zpljk7wlkivwyg2kcjcmz1nhf4es5om
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 4s.com

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

No credit card required
Get 1,000 Free Credits