iie.ac.cn

Valid Email Server
Domain Lookup › iie.ac.cn

Domain Overview

DNS: ✓ 1d ago Checker: ✓ 1d ago
iie.ac.cn
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-20 11:00:11 UTC · ↺ Refresh

MX Hostnames

  • mx.cstnet.cn
  • mx.cstnet.cn

MX Priorities

  • mx.cstnet.cn: 20
  • mx.cstnet.cn: 10

A / AAAA Records

  • 159.226.95.88 (no PTR)

Mail Server IPs

  • 159.226.251.12 ↩ mx.cstnet.cn

SOA Record

Raw SOA ns2.east.net.cn root.ns2.east.net.cn 1304161626 3600 600 1209600 3600
Primary NS (mname)
ns2.east.net.cn
Admin Email (rname)
root@ns2.east.net.cn
Serial
1304161626
Refresh
3600s
Retry
600s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

ns2.east.net.cn
ns2.east.net

SPF Record

✓ Strict (-all)
v=spf1 include:spf.mail.cstnet.cn -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

✗ 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 include:spf.mail.cstnet.cn -all
Free · No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for iie.ac.cn

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits