Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
jacober.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 21:13:52 UTC · ↺ Refresh
MX Hostnames
- jacober-com.mail.protection.outlook.com
MX Priorities
- jacober-com.mail.protection.outlook.com: 0
A / AAAA Records
- 172.67.71.236 (no PTR)
- 104.26.0.204 (no PTR)
- 104.26.1.204
- 2606:4700:20::681a:1cc
- 2606:4700:20::ac43:47ec
- 2606:4700:20::681a:cc
Mail Server IPs
- 52.101.41.3 ↩ mail-sj2pr05cu00103.inbound.protection.outlook.com
- 52.101.194.15 ↩ mail-ch4pr21cu00107.inbound.protection.outlook.com
- 52.101.50.7 ↩ mail-co1pr21cu00207.inbound.protection.outlook.com
- 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:c903::3 ↩ mail-mw2pr02cu00503.inbound.protection.outlook.com
- 2a01:111:f403:c902::7 ↩ mail-sj0pr02cu00107.inbound.protection.outlook.com
- 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:f908::1 ↩ mail-bn1pr04cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
hans.ns.cloudflare.com dns.cloudflare.com 2398756450 10000 2400 604800 1800
Primary NS (mname)
hans.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398756450
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
hans.ns.cloudflare.com
jessica.ns.cloudflare.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]; pct=100
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
4 records- google-site-verification=KhhBD5LxThMwJFHApjK0TANQyW5fYRgC6vJK60t-5aU
- SPFv=spf1 include:spf.protection.outlook.com -all
- MS=ms73368221
- google-site-verification=7-fRICcf8CJS71J4wPKZd6-3r1pbTlF5s7rvZSgCjNo
Full email verification for jacober.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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