Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
clarkson.edu
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 21:17:48 UTC · ↺ Refresh
MX Hostnames
- alt1.aspmx.l.google.com
- alt2.aspmx.l.google.com
- alt3.aspmx.l.google.com
- alt4.aspmx.l.google.com
- aspmx.l.google.com
MX Priorities
- alt3.aspmx.l.google.com: 10
- alt4.aspmx.l.google.com: 10
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
A / AAAA Records
- 23.185.0.4
- 2620:12a:8001::4
- 2620:12a:8000::4
Mail Server IPs
- 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
- 2a00:1450:4009:c0f::1b ↩ yulhrs-in-f27.1e100.net
- 173.194.76.27 ↩ ws-in-f27.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-x1a.1e100.net
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
- 142.251.16.27 ↩ bl-in-f27.1e100.net
- 2607:f8b0:4004:c06::1a ↩ bg-in-f26.1e100.net
SOA Record
Raw SOA
ns-cloud-c1.googledomains.com cloud-dns-hostmaster.google.com 1 21600 3600 259200 300
Primary NS (mname)
ns-cloud-c1.googledomains.com
Admin Email (rname)
cloud-dns-hostmaster@google.com
Serial
1
Refresh
21600s
Retry
3600s
Expire
259200s
Minimum TTL
300s
Nameservers (NS)
ns-cloud-c2.googledomains.com
ns-cloud-c1.googledomains.com
ns-6.awsdns-00.com
ns-719.awsdns-25.net
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:128.153.0.0/21 include:spf1.clarkson.edu include:_spf.google.com include:mailgun.org ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
google._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 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- ZOOM_verify_NCt2kq5iTaSwCOHM7O3ubA
- _prh7mwe4mc8s1mzk6u2n8a9srxd3h8j
- google-site-verification=OiQN9YKG9UmITG9_tYrZRO87cR6pBW0ZpB5BUYQ1Tjg
- google-site-verification=_77LGyfZ1rzd4xlybnO8orF2c3Kgjg7q5i8nwgUFdSs
- adobe-idp-site-verification=e23a0fae4f7c2a67b869a4cf4163941da9f508cdf6f5dd58684d1819bba28119
- SPFv=spf1 ip4:128.153.0.0/21 include:spf1.clarkson.edu include:_spf.google.com include:mailgun.org ~all
- google-site-verification=XWpIJyGL98lv2ZvYwwR7R9jBqsGrw5ok6YEJbOJlta0
- facebook-domain-verification=vy7phekpp3h146ybum8u3mqf7e70eg
- DirectFedAuthUrl=https://cas.clarkson.edu/cas/idp/profile/SAML2/Redirect/SSO
- google-site-verification=qWWxrymYSY7W-ECDRmJWQdg4Ly9ZvNEzLXdlYtIQ5To
- google-site-verification=nC3uZXMKuJABXkhpmgsEaPxFktTfi1viVX02C961wYA
- apple-domain-verification=8gorWVCcHweKGr8U
- google-site-verification=xoPXh-l0ozQMv1UUKm7DtxhvBJROBRbupZr_BW4ToEY
- have-i-been-pwned-verification=46ca0630b72ac9aa507a173077c36c84
- autodesk-domain-verification=d9roUX-vV-l5O8LmpO_k
Full email verification for clarkson.edu
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