Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
catl-21c.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 08:16:06 UTC · ↺ Refresh
MX Hostnames
- catl21c-com01b.mail.protection.outlook.com
MX Priorities
- catl21c-com01b.mail.protection.outlook.com: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 52.101.137.0 ↩ mail-sg2pr03cu00500.inbound.protection.outlook.com
- 52.101.124.117 ↩ mail-tydpr03cu00105.inbound.protection.outlook.com
- 52.101.157.80 ↩ mail-os8pr02cu00100.inbound.protection.outlook.com
- 2a01:111:f403:cc1f::4 ↩ mail-os8pr02cu00104.inbound.protection.outlook.com
- 2a01:111:f403:cc09:: ↩ mail-sg2pr03cu00500.inbound.protection.outlook.com
- 2a01:111:f403:cc1a::8 ↩ mail-tydpr03cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
vip3.alidns.com hostmaster.hichina.com 2025121011 3600 1200 86400 600
Primary NS (mname)
vip3.alidns.com
Admin Email (rname)
hostmaster@hichina.com
Serial
2025121011
Refresh
3600s
Retry
1200s
Expire
86400s
Minimum TTL
600s
Nameservers (NS)
vip3.alidns.com
vip4.alidns.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:59.58.48.133 ip4:36.250.157.7 ip4:183.251.232.96 ip4:36.250.157.2 ip4:117.28.248.130 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; pct=100; p=quarantine
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
7 records- SPFv=spf1 ip4:59.58.48.133 ip4:36.250.157.7 ip4:183.251.232.96 ip4:36.250.157.2 ip4:117.28.248.130 include:spf.protection.outlook.com -all
- rapi2cha5etta1mk3gg3o0lj0i
- q72af56cesnus6pque1j5he9sr
- cg5529dhd7eqggfcjrppqj3qns
- MS=ms93965975
- MS=ms60753429
- 2h1BBJvoVO5HMLyuCILKdUjvAXmNq4WiZhql7td5kRC3MxNBxh1ns5/d1mdpW7JIOU6POSuJACDoh+sBrHjv7w==
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