jlu.edu.cn

Valid Email Server
Domain Lookup › jlu.edu.cn

Domain Overview

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

Checked via [email protected] · 2026-03-20 04:06:33 UTC · ↺ Refresh

MX Hostnames

  • mailgw.jlu.edu.cn

MX Priorities

  • mailgw.jlu.edu.cn: 0

A / AAAA Records

  • 202.198.16.83 ↩ ws16-83.jlu.edu.cn

Mail Server IPs

  • 202.198.16.77 ↩ mailgw.jlu.edu.cn

SOA Record

Raw SOA dns.jlu.edu.cn master.jlu.edu.cn 2025081827 720 32400 604800 86400
Primary NS (mname)
dns.jlu.edu.cn
Admin Email (rname)
master@jlu.edu.cn
Serial
2025081827
Refresh
720s
Retry
32400s
Expire
604800s
Minimum TTL
86400s

Nameservers (NS)

dns2.jlu.edu.cn
dns.jlu.edu.cn

SPF Record

✓ Strict (-all)
v=spf1 ip4:202.198.16.76 ip4:202.198.16.89 ip4:202.198.16.77 ip4:202.198.16.78 ip4:202.198.16.79 include:spf.icoremail.net -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 1 found
dkim._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: dkim

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

All TXT Records

2 records
  • SPFv=spf1 ip4:202.198.16.76 ip4:202.198.16.89 ip4:202.198.16.77 ip4:202.198.16.78 ip4:202.198.16.79 include:spf.icoremail.net -all
  • MS=06948F9093B066E5250CD06DD49E5AAAC1EAC512
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