nuc.edu.cn

Valid Email Server
Domain Lookup › nuc.edu.cn

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
nuc.edu.cn
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-30 22:42:53 UTC · ↺ Refresh

MX Hostnames

  • mxbiz2.qq.com
  • mxbiz1.qq.com

MX Priorities

  • mxbiz1.qq.com: 5
  • mxbiz2.qq.com: 10

A / AAAA Records

  • 202.207.177.3 (no PTR)

Mail Server IPs

  • 103.86.78.3 (no PTR)
  • 103.86.78.2 (no PTR)
  • 43.154.252.202 (no PTR)
  • 43.154.252.16 (no PTR)

SOA Record

Raw SOA ns.nuc.edu.cn mail.nuc.edu.cn 503 28800 3600 604800 1800
Primary NS (mname)
ns.nuc.edu.cn
Admin Email (rname)
mail@nuc.edu.cn
Serial
503
Refresh
28800s
Retry
3600s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

dns2.nuc.edu.cn
dns1.nuc.edu.cn
dns3.nuc.edu.cn
dns4.nuc.edu.cn

SPF Record

✗ Missing

No SPF record — domain is unprotected against spoofing.

⚠ No SPF record found. Email servers cannot verify authorized senders.

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

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

All TXT Records

1 record
  • ”v=spf1include:spf.mail.qq.com~all“
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