Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
z-flex.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 18:48:28 UTC · ↺ Refresh
MX Hostnames
- d166333a.ess.barracudanetworks.com
- d166333b.ess.barracudanetworks.com
MX Priorities
- d166333a.ess.barracudanetworks.com: 10
- d166333b.ess.barracudanetworks.com: 99
A / AAAA Records
- 155.130.138.23 ↩ cust-155.130.138.23.switch.com
Mail Server IPs
- 209.222.82.253 ↩ mail.ess.barracuda.com
- 209.222.82.255 ↩ mail.ess.barracuda.com
- 209.222.82.252 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
ns65.worldnic.com namehost.worldnic.com 121051816 10800 3600 604800 3600
Primary NS (mname)
ns65.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
121051816
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns65.worldnic.com
ns66.worldnic.com
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx a:mailout.flexmaster.com ip4:207.35.103.230/29 include:spf.ess.barracudanetworks.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 a mx a:mailout.flexmaster.com ip4:207.35.103.230/29 include:spf.ess.barracudanetworks.com ~all
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