guokeyun.com

Valid Email Server
Domain Lookup › guokeyun.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
guokeyun.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-03 14:55:32 UTC · ↺ Refresh

MX Hostnames

  • mx.263.net
  • mxw.263.net

MX Priorities

  • mxw.263.net: 5
  • mx.263.net: 10

A / AAAA Records

  • 210.72.13.177 (no PTR)
  • 2409:8c04:1001:1e::bb (no PTR)
  • 2409:8c04:1001:1e::13 (no PTR)

Mail Server IPs

  • 143.110.227.31 (no PTR)
  • 164.92.126.242 (no PTR)
  • 38.83.106.85 ↩ us-mx2.263.net
  • 38.83.106.84 ↩ us-mx1.263.net

SOA Record

Raw SOA cl1.sfndns.cn mail.sfn.cn 2026040322 172800 600 1209600 7200
Primary NS (mname)
cl1.sfndns.cn
Admin Email (rname)
mail@sfn.cn
Serial
2026040322
Refresh
172800s
Retry
600s
Expire
1209600s
Minimum TTL
7200s

Nameservers (NS)

cl2.sfndns.com
cl2.sfndns.cn
cl1.sfndns.cn
cl1.sfndns.com
vip2.sfndns.cn
vip1.sfndns.cn

SPF Record

✓ Soft Fail (~all)
v=spf1 include:spf.ismail.cn ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; fo=1; ruf=mailto:[email protected]; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

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

2 records
  • google-site-verification=lzIO64L6kuzLrKQd6p9IUB6xHTCcTo5R-1y2wu41dr8
  • SPFv=spf1 include:spf.ismail.cn ~all
Full email verification for guokeyun.com

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