Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
bjmu.edu.cn
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-01 09:05:47 UTC · ↺ Refresh
MX Hostnames
- sun440.bjmu.edu.cn
MX Priorities
- sun440.bjmu.edu.cn: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 202.112.176.43 ↩ sun440.bjmu.edu.cn
SOA Record
Raw SOA
indy.bjmu.edu.cn root.indy.bjmu.edu.cn 20081944 10800 3600 604800 86400
Primary NS (mname)
indy.bjmu.edu.cn
Admin Email (rname)
root@indy.bjmu.edu.cn
Serial
20081944
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
indy.bjmu.edu.cn
dns.bjmu.edu.cn
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:202.112.176.0/24 mx ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
1 record- SPFv=spf1 ip4:202.112.176.0/24 mx ~all
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