Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cstk.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-21 03:11:41 UTC · ↺ Refresh
MX Hostnames
- cstk-com.mail.protection.outlook.com
MX Priorities
- cstk-com.mail.protection.outlook.com: 0
A / AAAA Records
- 104.199.113.65 ↩ 65.113.199.104.bc.googleusercontent.com
Mail Server IPs
- 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
- 52.101.40.2 ↩ mail-cy1pr05cu00402.inbound.protection.outlook.com
- 52.101.8.34 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
- 2a01:111:f403:f805::1 ↩ mail-co1pr03cu00301.inbound.protection.outlook.com
- 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
- 2a01:111:f403:f905::3 ↩ mail-dm5pr02cu00203.inbound.protection.outlook.com
- 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns23.domaincontrol.com dns.jomax.net 2025082602 28800 7200 604800 600
Primary NS (mname)
ns23.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2025082602
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns23.domaincontrol.com
ns24.domaincontrol.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=quarantine; fo=1; pct=100; adkim=r; aspf=r
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 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- knowbe4-site-verification=26c9e4e4a948a456239195d3f50bfd41
- MS=ms75734325
- 55qf92g9glm8ia81tjfh949mon
- MS=ms83675891
- 26t74v1o6p746e5au4lrfsmmgd
- SPFv=spf1 include:spf.protection.outlook.com -all
- apple-domain-verification=w1B1jRC4hz2slSWv
Full email verification for cstk.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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