Domain Overview
DNS: โ 2mo ago
Checker: โ 2mo ago
pku.edu.cn
Yes
โ Yes
Unknown
No
No
โ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
ยท 2026-03-20 12:50:51 UTC ยท โบ Refresh
MX Hostnames
- gateway.pku.edu.cn
- mx-pku-edu-cn.icoremail.net
MX Priorities
- mx-pku-edu-cn.icoremail.net: 5
- gateway.pku.edu.cn: 10
A / AAAA Records
- 162.105.131.160 (no PTR)
Mail Server IPs
- 152.32.185.215 โฉ ucloud-cmmxproxy.icoremail.net
- 152.32.234.63 โฉ ucloud-cmmxproxy.icoremail.net
- 162.105.129.123 โฉ gateway.pku.edu.cn
SOA Record
Raw SOA
ns.pku.edu.cn hostmaster.pku.edu.cn 2026032002 3600 300 86400 3600
Primary NS (mname)
ns.pku.edu.cn
Admin Email (rname)
hostmaster@pku.edu.cn
Serial
2026032002
Refresh
3600s
Retry
300s
Expire
86400s
Minimum TTL
3600s
Nameservers (NS)
dns1.pku.edu.cn
dns2.pku.edu.cn
ns.pku.edu.cn
SPF Record
โ Strict (-all)
v=spf1 ip4:162.105.129.0/24 include:spf.icoremail.net -all
๐ DNS lookups: 1/10
โ Hard fail (-all) โ strict enforcement
DMARC Record
โ p=none
v=DMARC1; p=none; ruf=mailto:[email protected]; rua=mailto:[email protected]
โ p=none โ monitoring only, no enforcement
๐ SPF alignment: Relaxed
ยท DKIM alignment: Relaxed
๐ง Reports โ mailto:[email protected]
DKIM Selectors
โ 1 found
dkim._domainkey
โ Public key: 216 chars (valid)
โ DKIM properly configured for selector: dkim
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- _hzos8v1tcdrxo5uk1i5qyl7pnu7w15x
- SPFv=spf1 ip4:162.105.129.0/24 include:spf.icoremail.net -all
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