Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
client-server.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 07:59:13 UTC · ↺ Refresh
MX Hostnames
- d216357.b.ess.uk.barracudanetworks.com
- d216357.a.ess.uk.barracudanetworks.com
MX Priorities
- d216357.b.ess.uk.barracudanetworks.com: 5
- d216357.a.ess.uk.barracudanetworks.com: 0
A / AAAA Records
- 13.42.243.210 ↩ ec2-13-42-243-210.eu-west-2.compute.amazonaws.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
ns11.constellix.com dns.constellix.com 2015010151 43200 3600 1209600 180
Primary NS (mname)
ns11.constellix.com
Admin Email (rname)
dns@constellix.com
Serial
2015010151
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns61.constellix.net
ns11.constellix.com
ns21.constellix.com
ns31.constellix.com
ns41.constellix.net
ns51.constellix.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:20.117.83.53 ip4:20.117.151.205 include:spf.protection.outlook.com include:spf-uk.emailsignatures365.com include:_spf.eu.messagegears.net include:spf.ess.uk.barracudanetworks.com include:sendgrid.net -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
1 record- SPFv=spf1 ip4:20.117.83.53 ip4:20.117.151.205 include:spf.protection.outlook.com include:spf-uk.emailsignatures365.com include:_spf.eu.messagegears.net include:spf.ess.uk.barracudanetworks.com include:sendgrid.net -all
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