17500.cn

Valid Email Server
Domain Lookup › 17500.cn

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
17500.cn
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-14 02:11:37 UTC · ↺ Refresh

MX Hostnames

  • mailx.17500.cn
  • mxbackup2.junkemailfilter.com
  • mxbackup1.junkemailfilter.com

MX Priorities

  • mailx.17500.cn: 5
  • mxbackup2.junkemailfilter.com: 20
  • mxbackup1.junkemailfilter.com: 10

A / AAAA Records

  • 123.58.254.142 (no PTR)

Mail Server IPs

  • 123.58.254.141 (no PTR)
  • 184.105.182.216 (no PTR)
  • 184.105.182.214 (no PTR)
  • 184.105.182.215 (no PTR)
  • 184.105.182.225 (no PTR)
  • 184.105.182.224 (no PTR)
  • 184.105.182.226 (no PTR)
  • 184.105.182.144 ↩ 144-he.filtered.junkemailfilter.com

SOA Record

Raw SOA dns9.hichina.com hostmaster.hichina.com 2026011209 3600 1200 86400 600
Primary NS (mname)
dns9.hichina.com
Admin Email (rname)
hostmaster@hichina.com
Serial
2026011209
Refresh
3600s
Retry
1200s
Expire
86400s
Minimum TTL
600s

Nameservers (NS)

dns9.hichina.com
dns10.hichina.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:123.58.254.144 ip4:123.58.254.141 mx -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1;p=reject;pct=25;rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
⚠ Policy applies to 25% of failing messages only

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
  • SPFv=spf1 ip4:123.58.254.144 ip4:123.58.254.141 mx -all
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