Domain Overview
DNS: ✓ 20d ago
Checker: ✓ 20d ago
sina.cn
Yes
✓ Yes
Unknown
No
Yes
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 08:19:28 UTC · ↺ Refresh
MX Hostnames
- freemx2.sinamail.sina.com.cn
- freemx3.sinamail.sina.com.cn
- freemx1.sinamail.sina.com.cn
MX Priorities
- freemx2.sinamail.sina.com.cn: 10
- freemx1.sinamail.sina.com.cn: 10
- freemx3.sinamail.sina.com.cn: 10
A / AAAA Records
- 36.51.254.90 (no PTR)
Mail Server IPs
- 36.51.224.198 (no PTR)
SOA Record
Raw SOA
ns1.sina.com.cn zhihao.staff.sina.com.cn 1 1800 600 604800 600
Primary NS (mname)
ns1.sina.com.cn
Admin Email (rname)
zhihao@staff.sina.com.cn
Serial
1
Refresh
1800s
Retry
600s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns3.sina.com.cn
ns2.sina.com.cn
ns1.sina.com.cn
SPF Record
✓ Strict (-all)
v=spf1 include:spf.sinamail.sina.com.cn -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✗ None detectedNo 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- SPFv=spf1 include:spf.sinamail.sina.com.cn -all
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