Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mcr-systems.co.uk
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-17 22:49:12 UTC · ↺ Refresh
MX Hostnames
- d222733.a.ess.uk.barracudanetworks.com
- d222733.b.ess.uk.barracudanetworks.com
MX Priorities
- d222733.a.ess.uk.barracudanetworks.com: 99
- d222733.b.ess.uk.barracudanetworks.com: 99
A / AAAA Records
- 139.28.16.197 ↩ hhw7-197.headwall-hosting.com
Mail Server IPs
- 18.133.136.187 ↩ mail.ess.uk.barracuda.com
- 18.133.136.186 ↩ mail.ess.uk.barracuda.com
- 18.133.136.188 ↩ mail.ess.uk.barracuda.com
SOA Record
Raw SOA
ns0.phase8.net support.phase8.net 2026031301 28800 3600 604800 3600
Primary NS (mname)
ns0.phase8.net
Admin Email (rname)
support@phase8.net
Serial
2026031301
Refresh
28800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns0.phase8.net
ns1.phase8.net
ns2.phase8.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:213.251.59.1 include:spf.protection.outlook.com include:_spf.salesforce.com include:spf.ess.uk.barracudanetworks.com include:_spf.psm.knowbe4.com include:_spf.act-on.net include:spf.headwall-hosting.com include:spf-uk.emailsignatures365.com -all
📊 DNS lookups: 7/10
✓ 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
3 records- SPFv=spf1 ip4:213.251.59.1 include:spf.protection.outlook.com include:_spf.salesforce.com include:spf.ess.uk.barracudanetworks.com include:_spf.psm.knowbe4.com include:_spf.act-on.net include:spf.headwall-hosting.com include:spf-uk.emailsignatures365.com -all
- knowbe4-site-verification=e1b66941a13723202d8a64d012a37b38
- anthropic-domain-verification-ptchny=rHE7I2qe1sH3V8uofTd24HXNc
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