tjhsst.edu

Valid Email Server
Domain Lookup › tjhsst.edu

Domain Overview

DNS: ✓ 9d ago Checker: ✓ 9d ago
tjhsst.edu
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-08-20 22:59:21 UTC · ↺ Refresh

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MX Hostnames

  • mail.tjhsst.edu

MX Priorities

  • mail.tjhsst.edu: 10

A / AAAA Records

  • 198.38.18.202 ↩ www.tjhsst.edu
  • 2001:468:cc0:1802::202 (no PTR)

Mail Server IPs

  • 198.38.16.130 (no PTR)
  • 198.38.16.131 (no PTR)

SOA Record

Raw SOA ns1.tjhsst.edu hostmaster.tjhsst.edu 1786740047 3600 600 1209600 86400
Primary NS (mname)
ns1.tjhsst.edu
Admin Email (rname)
hostmaster@tjhsst.edu
Serial
1786740047
Refresh
3600s
Retry
600s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ipa2.tjhsst.edu
ipa1.tjhsst.edu
ns.uu.net
ns2.tjhsst.edu
ns1.tjhsst.edu

SPF Record

✓ Strict (-all)
v=spf1 ip4:198.38.16.130 ip4:198.38.16.131 ip6:2001:468:cc0:1600::130 ip6:2001:468:cc0:1600::131 -all
📊 DNS lookups: 0/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; adkim=r; aspf=r; rf=afrf
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 1 found
mail._domainkey
✓ Public key: 392 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

9 records
  • SPFv=spf1 ip4:198.38.16.130 ip4:198.38.16.131 ip6:2001:468:cc0:1600::130 ip6:2001:468:cc0:1600::131 -all
  • google-site-verification=bJuU1iPhNNIQwWD6pJXRL7DbqUS4tkywKUorOI3LIPY
  • DirectFedAuthUrl=tjhsst.edu
  • google-site-verification=SUWSehjMKZ9NLcRML0RnVueT2BbOUt8ygLnYn7xGFVw
  • MS=44859B1E40D11E2BB4B402628E60F3D643705748
  • google-site-verification=F3CMYM56kaGTxwCPF3C-_BQFSeaQ8UTGq9BDaOWSXFQ
  • DirectFedAuthUrl=https://sso.tjhsst.edu/auth/realms/csl/protocol/saml
  • google-site-verification=Nzj_a1s67WcehVdvFOO6ktj515HpomG4ZrhBhGzEhYw
  • google-site-verification=i394BjKZQeaYfVLNXNFAHWw4MVJCwpEJN-5CSK-KOE8
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