Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
jefferson.edu
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 06:50:46 UTC · ↺ Refresh
MX Hostnames
- mail.jefferson.edu
MX Priorities
- mail.jefferson.edu: 5
A / AAAA Records
- 34.225.29.166
- 35.170.194.184
Mail Server IPs
- 147.140.23.43 ↩ smtp.jefferson.edu
- 147.140.23.77 ↩ smtpin04pa.jefferson.edu
- 147.140.23.42 ↩ smtpin03pb.jefferson.edu
- 147.140.23.40 ↩ smtp.jefferson.edu
- 147.140.23.74 ↩ smtpin02pb.jefferson.edu
- 147.140.23.52 ↩ smtp.jefferson.edu
- 147.140.23.51 ↩ smtpin01pb.jefferson.edu
- 147.140.23.35 ↩ smtp.jefferson.edu
- 147.140.23.64 ↩ mail.jefferson.edu
- 147.140.23.69 ↩ smtpin07pb.jefferson.edu
- 147.140.23.68
- 147.140.23.67
- 147.140.23.66
- 147.140.23.46
SOA Record
Raw SOA
ns4.jefferson.edu hostmaster.tju.edu 2012015936 21600 3600 604800 600
Primary NS (mname)
ns4.jefferson.edu
Admin Email (rname)
hostmaster@tju.edu
Serial
2012015936
Refresh
21600s
Retry
3600s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns4.jefferson.edu
ns3.tju.edu
SPF Record
✓ Strict (-all)
v=spf1 exists:%{i}._i.%{d}._d.espf.agari.com include:%{d}.30.spf-protect.agari.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; fo=1; pct=100; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
23 records- pexip-portal-domain-verification=9e7491ff-9fe6-459e-ad5b-755597ec307c
- cisco-ci-domain-verification=7235ed18babfdc23fe461ed2dbc7ef9b4b6f503389dbc22d81957aaf00c10819
- google-gws-recovery-domain-verification=65703120
- pexip-ms-tenant-domain-verification=9e7491ff-9fe6-459e-ad5b-755597ec307c
- yahoo-verification-key=AhroyhnJWzjyYH3euBg+zfnhxcnYW5jG9Ert46hpuLI=
- google-site-verification=WzrM75lsGyzl66vgOvgkKQCfhtFJNZreN4hus3nOOfw
- SPFv=spf1 exists:%{i}._i.%{d}._d.espf.agari.com include:%{d}.30.spf-protect.agari.com -all
- apple-domain-verification=95LsOgLo4R2Mun2U
- airtable-verification=9207319b71a4c4277c19a415ee4498fb
- MS=ms56094358
- adobe-sign-verification=3b8b62dc8d793699f8a57796a08119e2
- knowbe4-site-verification=ee40bf68d459fd60d2f8cc91b9e5f7bd
- ecostruxure-it-verification=6e98e508-e9d1-4ae3-9fea-fee74c6bf187
- google-site-verification=Vv9mggr2nyjVCLSdN478du1_tjGN8PD0vXJF1fjn0go
- domain-verification=70f1d869-71f9-de4c-858f-18c8e03b304f
- cisco-ci-domain-verification=52c5b962d244fb403e1652e2b561fc8ccd95c524a72ed074480c54139d479b44
- _vxa02cjj61vgt8fla82ux2xd63q392e
- 8ff06ff49ddf43e6b50b6a35ea8372b9
- jamf-site-verification=s08jCEVXnt2qUigAGMJTIA
- corestream-sfmc-token=SFMC-Upug3Ukf3Cg4B3JC2qWli6Ad8OIdniXDe6_cr4wl
- MS=ms71720074
- 67395508
- specops-verification-code=f8f071c2-c2f1-4659-ab11-aa726ffb049d
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