Domain Overview
DNS: ✓ 6h ago
Checker: ✓ 6h ago
mentorx.net
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 04:42:41 UTC · ↺ Refresh
MX Hostnames
- mx1.feishu.cn
- mx2.feishu.cn
- mx3.feishu.cn
MX Priorities
- mx2.feishu.cn: 5
- mx1.feishu.cn: 1
- mx3.feishu.cn: 10
A / AAAA Records
- 172.66.43.22 (no PTR)
- 172.66.40.234 (no PTR)
- 2606:4700:3108::ac42:28ea (no PTR)
- 2606:4700:3108::ac42:2b16 (no PTR)
Mail Server IPs
- 122.14.229.0 (no PTR)
- 101.126.58.225 (no PTR)
- 52.220.106.220 ↩ ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com
SOA Record
Raw SOA
april.ns.cloudflare.com dns.cloudflare.com 2404691221 10000 2400 604800 1800
Primary NS (mname)
april.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2404691221
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
nile.ns.cloudflare.com
april.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_netblocks.m.feishu.cn include:amazonses.com include:us-west-2.amazonses.com include:ka.d.sender-sib.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; pct=100; rua=mailto:[email protected]; adkim=s; aspf=r; fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
mail._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- google-site-verification=dPz4DxNIIKtsPaCUe6i_o-O4Q9lzI5evpBP6yDLhbE8
- SPFv=spf1 include:_netblocks.m.feishu.cn include:amazonses.com include:us-west-2.amazonses.com include:ka.d.sender-sib.com ~all
- verification-code-site-App_feishu=Tv3eozGLufAAJjedyPKB
- brevo-code:3f5c1ea8e77551838da236a2ee131214
- google-site-verification=TKOAtKC8iDJ0YKFFsv-Hc7ZyYeHViLNmFXoT6ZPGB_Q
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