tstc.edu

Valid Email Server
Domain Lookup › tstc.edu

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
tstc.edu
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-27 21:55:51 UTC · ↺ Refresh

MX Hostnames

  • alt2.aspmx.l.google.com
  • alt4.aspmx.l.google.com
  • aspmx.l.google.com
  • alt3.aspmx.l.google.com
  • alt1.aspmx.l.google.com

MX Priorities

  • alt2.aspmx.l.google.com: 5
  • alt3.aspmx.l.google.com: 10
  • alt4.aspmx.l.google.com: 10
  • aspmx.l.google.com: 1
  • alt1.aspmx.l.google.com: 5

A / AAAA Records

  • 23.185.0.3
  • 2620:12a:8000::3
  • 2620:12a:8001::3

Mail Server IPs

  • 172.253.116.26 ↩ dj-in-f26.1e100.net
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
  • 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
  • 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
  • 173.194.76.26 ↩ ws-in-f26.1e100.net
  • 2a00:1450:400c:c00::1b ↩ ws-in-f27.1e100.net
  • 142.251.163.27 ↩ wv-in-f27.1e100.net
  • 2607:f8b0:4004:c1d::1a ↩ ww-in-f26.1e100.net
  • 108.177.123.26 ↩ lcscld-in-f26.1e100.net
  • 2800:3f0:4003:c0f::1a (no PTR)

SOA Record

Raw SOA ns1.tstc.edu nameservices.tstc.edu 2026032402 3600 300 1209600 43200
Primary NS (mname)
ns1.tstc.edu
Admin Email (rname)
nameservices@tstc.edu
Serial
2026032402
Refresh
3600s
Retry
300s
Expire
1209600s
Minimum TTL
43200s

Nameservers (NS)

ns2.tstc.edu
ns3.tstc.edu
ns1.tstc.edu

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:148.62.51.136 ip4:192.133.126.8 ip4:192.133.126.9 ip4:206.51.48.20 include:_spf.rsolution.tstc.edu include:_spf.google.com include:aspmx.pardot.com include:_tuf-spf.touchnet.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 3 found
google._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

15 records
  • eboistvsev0na91e310gq2gr0k
  • ie4hk4dj9kre2u1dc7gio7pu65
  • vvo3tosh1r1ogul86ccco3fcrm
  • apple-domain-verification=YaaMWYwRw1ASblpf
  • -yxyglKM75K7INxedCCxS7S3VhpbNvV1QeTfyPssjpk
  • canva-site-verification=dCqH0CNxpefc9T7Nf2aezw
  • autodesk-domain-verification=OX4Y5p2o2zdsf4zT5Tu5
  • openai-domain-verification=dv-51QgTWA4sppDa6m7lppPDptT
  • twilio-domain-verification=442a2e6c5789ea003ae65d44a4ac2c35
  • google-site-verification=GNNpqX1hjO_58MxjzK4Zl9BSczolIKBuXQRmsfJ_IMQ
  • sending_domain986521=a834b8c804b35afeb7a1712abe242764b84a69e52e6e043f8b173910424e1264
  • DirectFedAuthUrl=https://tstc.auth.securid.com/sso/saml/416c4d7e-91b0-49f4-afe0-8a70692bec00
  • adobe-idp-site-verification=f11edfefb9632c0e002d72314c971365b648d8319116946a3bb3c9e08dc81f84
  • SPFv=spf1 ip4:148.62.51.136 ip4:192.133.126.8 ip4:192.133.126.9 ip4:206.51.48.20 include:_spf.rsolution.tstc.edu include:_spf.google.com include:aspmx.pardot.com include:_tuf-spf.touchnet.com ~all
  • 5654levpf5prevvob2d3pnd3nn
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