Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
greenstone.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 17:57:07 UTC · ↺ Refresh
MX Hostnames
- d215358.a.ess.uk.barracudanetworks.com
- d215358.b.ess.uk.barracudanetworks.com
MX Priorities
- d215358.a.ess.uk.barracudanetworks.com: 5
- d215358.b.ess.uk.barracudanetworks.com: 5
A / AAAA Records
- 52.56.113.32 ↩ ec2-52-56-113-32.eu-west-2.compute.amazonaws.com
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.chalkline.cloud hostmaster.freethought.uk 2026032603 3600 600 604800 300
Primary NS (mname)
ns1.chalkline.cloud
Admin Email (rname)
hostmaster@freethought.uk
Serial
2026032603
Refresh
3600s
Retry
600s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns3.chalkline.net
ns1.chalkline.cloud
ns2.chalkline.support
SPF Record
✓ Strict (-all)
v=spf1 ip4:82.69.118.65 include:spf.protection.outlook.com include:spf.ess.uk.barracudanetworks.com include:sendgrid.net include:mail.briefyourmarket.com include:spf.brandingserver.net -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 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
2 records- google-site-verification=yrm7MHeup-fWqsN_mM96n5mNeX0ZgxtGxU4U98KVS5c
- SPFv=spf1 ip4:82.69.118.65 include:spf.protection.outlook.com include:spf.ess.uk.barracudanetworks.com include:sendgrid.net include:mail.briefyourmarket.com include:spf.brandingserver.net -all
Full email verification for greenstone.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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