Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
coretechelectrical.co.uk
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 13:20:51 UTC · ↺ Refresh
MX Hostnames
- d221341.b.ess.uk.barracudanetworks.com
- d221341.a.ess.uk.barracudanetworks.com
MX Priorities
- d221341.b.ess.uk.barracudanetworks.com: 20
- d221341.a.ess.uk.barracudanetworks.com: 10
A / AAAA Records
- 5.134.10.177 ↩ identifywebdesign.gds.guru.net.uk
Mail Server IPs
- 18.133.136.186 ↩ mail.ess.uk.barracuda.com
- 18.133.136.187 ↩ mail.ess.uk.barracuda.com
- 18.133.136.188 ↩ mail.ess.uk.barracuda.com
SOA Record
Raw SOA
ns1.interdns.co.uk hostmaster.interdns.co.uk 1752682928 3600 600 604800 86400
Primary NS (mname)
ns1.interdns.co.uk
Admin Email (rname)
hostmaster@interdns.co.uk
Serial
1752682928
Refresh
3600s
Retry
600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns3.interdns.co.uk
ns4.interdns.co.uk
ns1.interdns.co.uk
ns2.interdns.co.uk
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.ess.uk.barracudanetworks.com ip4:194.106.222.198 include:andromeda.dcmanaged.com include:emsd1.com ip4:50.31.156.116 -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ 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- SPFv=spf1 include:spf.protection.outlook.com include:spf.ess.uk.barracudanetworks.com ip4:194.106.222.198 include:andromeda.dcmanaged.com include:emsd1.com ip4:50.31.156.116 -all
- google-site-verification=ITiiBNeLfK0ZLX2VjFH6Reo7LBzfZ61LEYWODXIItSE
- MS=ms64096220
- ppe-395ef4a74a3a0ac9835d
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 coretechelectrical.co.uk
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits