Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
demuk.co.uk
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-04 10:13:51 UTC · ↺ Refresh
MX Hostnames
- demuk.co.uk
MX Priorities
- demuk.co.uk: 0
A / AAAA Records
- 149.255.62.165 ↩ cloud776.thundercloud.uk
Mail Server IPs
- 149.255.62.165 ↩ cloud776.thundercloud.uk
SOA Record
Raw SOA
ns0.thundercloud.uk james.demuk.co.uk 2026030601 3600 1800 1209600 86400
Primary NS (mname)
ns0.thundercloud.uk
Admin Email (rname)
james@demuk.co.uk
Serial
2026030601
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns0.thundercloud.uk
ns1.thundercloud.uk
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:149.255.62.165 include:relay.thundermail.uk ip4:149.255.62.10 +a +mx ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; sp=none; rf=afrf; pct=100; ri=86400
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: none
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:149.255.62.165 include:relay.thundermail.uk ip4:149.255.62.10 +a +mx ~all
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 demuk.co.uk
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits