Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
thundercreek.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 20:53:08 UTC · ↺ Refresh
MX Hostnames
- d273682b.ess.barracudanetworks.com
- d273682a.ess.barracudanetworks.com
MX Priorities
- d273682b.ess.barracudanetworks.com: 25
- d273682a.ess.barracudanetworks.com: 10
A / AAAA Records
- 52.86.49.70 ↩ ec2-52-86-49-70.compute-1.amazonaws.com
- 3.214.154.225 ↩ ec2-3-214-154-225.compute-1.amazonaws.com
Mail Server IPs
- 209.222.82.255 ↩ mail.ess.barracuda.com
- 209.222.82.253 ↩ mail.ess.barracuda.com
- 209.222.82.252 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
arnold.ns.cloudflare.com dns.cloudflare.com 2399171847 10000 2400 604800 1800
Primary NS (mname)
arnold.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399171847
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
walk.ns.cloudflare.com
arnold.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:209.135.140.37 ip4:13.111.53.121 include:spf.protection.outlook.com include:aspmx.pardot.com include:243823274.spf07.hubspotemail.net ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
default._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- apple-domain-verification=DAuaHlA1iN9sWtxt
- google-site-verification=3PQBxETMA14PUHKl2f8k7a4cgE_26xhUmoJpccJt7t8
- SPFv=spf1 ip4:209.135.140.37 ip4:13.111.53.121 include:spf.protection.outlook.com include:aspmx.pardot.com include:243823274.spf07.hubspotemail.net ~all
- MS=ms67960653
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 thundercreek.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits