Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
s-bconstruction.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 15:18:06 UTC · ↺ Refresh
MX Hostnames
- d80151a.ess.barracudanetworks.com
- d80151b.ess.barracudanetworks.com
MX Priorities
- d80151a.ess.barracudanetworks.com: 10
- d80151b.ess.barracudanetworks.com: 10
A / AAAA Records
- 141.193.213.20 (no PTR)
- 141.193.213.21 (no PTR)
Mail Server IPs
- 209.222.82.255 ↩ mail.ess.barracuda.com
- 209.222.82.253 ↩ mail.ess.barracuda.com
- 209.222.82.252 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
ns25.worldnic.com namehost.worldnic.com 125080110 10800 3600 604800 3600
Primary NS (mname)
ns25.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125080110
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns26.worldnic.com
ns25.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:172.18.20.1/30 ip4:216.176.14.182 include:SendGrid.net include:isqftmail.com include:spf.ess.barracudanetworks.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; sp=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; adkim=r; aspf=r
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 2 found
s1._domainkey
s2._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 ip4:172.18.20.1/30 ip4:216.176.14.182 include:SendGrid.net include:isqftmail.com include:spf.ess.barracudanetworks.com -all
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