Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
castlesestateagents.co.uk
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-22 02:04:10 UTC · ↺ Refresh
MX Hostnames
- d203654.b.ess.uk.barracudanetworks.com
- d203654.a.ess.uk.barracudanetworks.com
MX Priorities
- d203654.b.ess.uk.barracudanetworks.com: 20
- d203654.a.ess.uk.barracudanetworks.com: 10
A / AAAA Records
- 141.193.213.21 (no PTR)
- 141.193.213.20 (no PTR)
Mail Server IPs
- 18.133.136.188 ↩ mail.ess.uk.barracuda.com
- 18.133.136.187 ↩ mail.ess.uk.barracuda.com
- 18.133.136.186 ↩ mail.ess.uk.barracuda.com
SOA Record
Raw SOA
ns1.cix.uk hostmaster.cix.uk 1752680218 3600 600 604800 86400
Primary NS (mname)
ns1.cix.uk
Admin Email (rname)
hostmaster@cix.uk
Serial
1752680218
Refresh
3600s
Retry
600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns2.cix.uk
ns3.cix.uk
ns4.cix.uk
ns1.cix.uk
SPF Record
✓ Soft Fail (~all)
v=spf1 include:spf.ess.uk.barracudanetworks.com include:spf.protection.outlook.com include:spf-v6b.rocketseed.com include:spf.brandingserver.net include:mail.briefyourmarket.com ~all
📊 DNS lookups: 5/10
~ 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
✓ 1 found
google._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- MS=ms14479080
- SPFv=spf1 include:spf.ess.uk.barracudanetworks.com include:spf.protection.outlook.com include:spf-v6b.rocketseed.com include:spf.brandingserver.net include:mail.briefyourmarket.com ~all
- facebook-domain-verification=2ikevpptv5dvtcvqg1fuzqyh2u4nus
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 castlesestateagents.co.uk
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits