Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
hslc.org
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-19 01:04:25 UTC · ↺ Refresh
MX Hostnames
- d191613b.ess.barracudanetworks.com
- d191613a.ess.barracudanetworks.com
MX Priorities
- d191613b.ess.barracudanetworks.com: 20
- d191613a.ess.barracudanetworks.com: 10
A / AAAA Records
- 192.100.94.9 ↩ proxy01-365.hslc.org
Mail Server IPs
- 209.222.82.252 ↩ mail.ess.barracuda.com
- 209.222.82.255 ↩ mail.ess.barracuda.com
- 209.222.82.253 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
ns1.hslc.net hostmaster.hslc.net 2026031801 3600 900 1209600 600
Primary NS (mname)
ns1.hslc.net
Admin Email (rname)
hostmaster@hslc.net
Serial
2026031801
Refresh
3600s
Retry
900s
Expire
1209600s
Minimum TTL
600s
Nameservers (NS)
ns3.hslc.net
ns1.hslc.net
ns2.hslc.net
SPF Record
✓ Strict (-all)
v=spf1 mx a:mail.palibrary.org ip4:76.8.51.131 a:mail.hslc.net ip4:192.100.94.0/24 ip4:66.216.50.66 -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; pct=100; sp=quarantine
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- yahoo-verification-key=ZHe4mYHe0FLSg6ikjcw8JgnbAIuUB2VcXjWm59RSo/A=
- SPFv=spf1 mx a:mail.palibrary.org ip4:76.8.51.131 a:mail.hslc.net ip4:192.100.94.0/24 ip4:66.216.50.66 -all
- google-site-verification=maEuLjrgJCYyiuEEebuUT7_ttLOlCNYnlYHv1uFKGEY
- MS=1552C3D52345C250DFC4C5B3D060E077FEABBEB8
Full email verification for hslc.org
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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