Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dmkuk.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-21 00:17:02 UTC · ↺ Refresh
MX Hostnames
- d228432.b.ess.uk.barracudanetworks.com
- d228432.a.ess.uk.barracudanetworks.com
MX Priorities
- d228432.a.ess.uk.barracudanetworks.com: 10
- d228432.b.ess.uk.barracudanetworks.com: 90
A / AAAA Records
- 185.151.30.181 ↩ 185-151-30-181.ptr4.stackcp.net
- 2a07:7800::181 (no PTR)
Mail Server IPs
- 18.133.136.186 ↩ mail.ess.uk.barracuda.com
- 18.133.136.188 ↩ mail.ess.uk.barracuda.com
- 18.133.136.187 ↩ mail.ess.uk.barracuda.com
SOA Record
Raw SOA
ns1.stackdns.com hostmaster.stackdns.com 1764095099 1800 900 1209600 300
Primary NS (mname)
ns1.stackdns.com
Admin Email (rname)
hostmaster@stackdns.com
Serial
1764095099
Refresh
1800s
Retry
900s
Expire
1209600s
Minimum TTL
300s
Nameservers (NS)
ns4.stackdns.com
ns3.stackdns.com
ns1.stackdns.com
ns2.stackdns.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:167.89.18.77 include:spf.ess.uk.barracudanetworks.com include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;sp=none;adkim=r;aspf=r;pct=100;rf=afrf;ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: none
DKIM Selectors
✓ 1 found
s1._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:167.89.18.77 include:spf.ess.uk.barracudanetworks.com include:spf.protection.outlook.com -all
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