Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
usna.edu
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-03 19:11:41 UTC · ↺ Refresh
MX Hostnames
- alt4.aspmx.l.google.com
- aspmx.l.google.com
- alt2.aspmx.l.google.com
- alt3.aspmx.l.google.com
- alt1.aspmx.l.google.com
MX Priorities
- alt3.aspmx.l.google.com: 10
- alt4.aspmx.l.google.com: 10
- aspmx.l.google.com: 1
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
A / AAAA Records
- 136.160.88.139
Mail Server IPs
- 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
- 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
- 173.194.76.27 ↩ ws-in-f27.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-f26.1e100.net
- 192.178.218.27 ↩ yuiadtq-in-f27.1e100.net
- 2607:f8b0:4004:c1b::1a ↩ wv-in-f26.1e100.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::1b ↩ dj-in-f27.1e100.net
SOA Record
Raw SOA
ns-a.usna.edu dns.usna.edu 2015123565 21600 2160 1296000 900
Primary NS (mname)
ns-a.usna.edu
Admin Email (rname)
dns@usna.edu
Serial
2015123565
Refresh
21600s
Retry
2160s
Expire
1296000s
Minimum TTL
900s
Nameservers (NS)
ns-b.usna.edu
ns-a.usna.edu
SPF Record
✓ Strict (-all)
v=spf1 ip4:136.160.88.0/21 ip4:216.177.90.7/32 ip4:209.67.131.231/32 ip4:216.177.90.15/32 ip4:50.31.43.252/32 ip4:168.245.122.109/32 ip4:216.24.224.0/20 include:_spf.google.com include:_spf.salesforce.com include:mh.blackboard.com include:spf.constantcontact.com include:spf1.formassembly.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; rua=mailto:[email protected],mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 1 found
google._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
9 records- google-site-verification=EdyTMfmIqs2ecfv3s36AmckvZ_nQiJp6HorNVXyoI_0
- SPFv=spf1 ip4:136.160.88.0/21 ip4:216.177.90.7/32 ip4:209.67.131.231/32 ip4:216.177.90.15/32 ip4:50.31.43.252/32 ip4:168.245.122.109/32 ip4:216.24.224.0/20 include:_spf.google.com include:_spf.salesforce.com include:mh.blackboard.com include:spf.constantcontact.com include:spf1.formassembly.com -all
- MS=FFA4BCA6F14EFD3DB476E2ED58EAB062063E83C0
- apple-domain-verification=QSV7fEUU1klWtogk
- _88d63cb993o3d1elyoam6wlfxxcbrj0
- adobe-idp-site-verification=1d738a39f37f7e6c04c405c0eb083a3b174373eec242bcb22b7dd88aa71e3221
- google-site-verification=ne68o_3dtVn6fG2bIsUPeIDEViY0d8blB2E_Zvrg-wA
- _oqy15nleng91ufwdq1mee56oqvgys7j
- 35sqcn21n6tpj8b7ss7kl8fpkqlgkqth
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