kosteckecpa.com

Valid Email Server
Domain Lookup › kosteckecpa.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
kosteckecpa.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-18 13:32:52 UTC · ↺ Refresh

MX Hostnames

  • d241425a.ess.barracudanetworks.com
  • d241425b.ess.barracudanetworks.com

MX Priorities

  • d241425b.ess.barracudanetworks.com: 20
  • d241425a.ess.barracudanetworks.com: 10

A / AAAA Records

  • 100.24.208.97 ↩ staticip2.multiscreensite.com
  • 35.172.94.1 ↩ staticip.multiscreensite.com

Mail Server IPs

  • 209.222.82.253 ↩ mail.ess.barracuda.com
  • 209.222.82.252 ↩ mail.ess.barracuda.com
  • 209.222.82.255 ↩ mail.ess.barracuda.com

SOA Record

Raw SOA clay.ns.cloudflare.com dns.cloudflare.com 2398894531 10000 2400 604800 1800
Primary NS (mname)
clay.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398894531
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

clay.ns.cloudflare.com
ulla.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:104.197.243.175 ip4:71.66.25.34 +a +mx +include:spf.ess.barracudanetworks.com +include:_spf.google.com -all
📊 DNS lookups: 4/10
✓ 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

3 records
  • SPFv=spf1 ip4:104.197.243.175 ip4:71.66.25.34 +a +mx +include:spf.ess.barracudanetworks.com +include:_spf.google.com -all
  • MS=ms44342412
  • google-site-verification=zB9jXYSipzwygr0OAa1QZK3H2ez0g30tWO1SqcfbXSM
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 kosteckecpa.com

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

No credit card required
Get 1,000 Free Credits